We're dividing 76646386 by 210 
The aim is to understand the frequency of 210 in 76646386.

Moving on to step 1:
When dividing 7 by 210, we get 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 210

Going ahead to step 2:
76 divided by 210 is 0 with a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Include the next digit (6) from the dividend after 76, then repeat: 766 / 210

Moving on to step 3:
210 can be fit into 766 3 times, resulting in a remainder of 136.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtracting 630 from 766 leaves us with 136.
Grab the next digit (4) from the dividend, add it to 136, then carry on: 1364 / 210

Advancing to step 4:
The number 210 fits into 1364 6 times, leaving a remainder of 104.
The next digit of our result is 6. 
Result so far: 36.0
If we take 1260 away from 1364, we end up with 104.
Fetch the next digit (6) from the dividend, attach it to 104 and continue: 1046 / 210

Step 5:
When dividing 1046 by 210, we get 4 with a remainder of 206.
The next digit of our result is 4. 
Result so far: 364.0
If we subtract 840 from 1046, we get 206.
Bring next digit (3) of the dividend behind the 206 and repeat the process: 2063 / 210

Moving on to step 6:
When dividing 2063 by 210, we get 9 with a remainder of 173.
The next digit of our result is 9. 
Result so far: 3649.0
Subtract 1890 from 2063 to get 173.
Grab the next digit (8) from the dividend, add it to 173, then carry on: 1738 / 210

Moving on to step 7:
The number 210 fits into 1738 8 times, leaving a remainder of 58.
The next digit of our result is 8. 
Result so far: 36498.0
Deduct 1680 from 1738 and we're left with 58.
Append the next digit (6) from the dividend to 58 and continue with: 586 / 210

Let's proceed to step 8:
When dividing 586 by 210, we get 2 with a remainder of 166.
Put 2 as the next digit of the answer. 
Result so far: 364982.0
If we subtract 420 from 586, we get 166.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1660, and continue the process.

Let's proceed to step 9:
The number 210 fits into 1660 7 times, leaving a remainder of 190.
Write down 7 as next digit of the result. 
Result so far: 364982.7
If we take 1470 away from 1660, we end up with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Step 10:
210 can be fit into 1900 9 times, resulting in a remainder of 10.
The next digit of our result is 9. 
Result so far: 364982.79
If we subtract 1890 from 1900, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 11:
The number 210 fits into 100 0 times, leaving a remainder of 100.
Write down 0 as next digit of the result. 
Result so far: 364982.79
Deduct 0 from 100 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Going ahead to step 12:
When dividing 1000 by 210, we get 4 with a remainder of 160.
Put 4 as the next digit of the answer. 
Result so far: 364982.7904
Subtracting 840 from 1000 leaves us with 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Moving on to step 13:
If we divide 1600 by 210, we get 7 and a remainder of 130.
The next digit of our result is 7. 
Result so far: 364982.79047
Subtract 1470 from 1600 to get 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 14:
The number 210 fits into 1300 6 times, leaving a remainder of 40.
Record the quotient 6 as the next digit in the result. 
Result so far: 364982.790476
If we take 1260 away from 1300, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 15:
When dividing 400 by 210, we get 1 with a remainder of 190.
Record the quotient 1 as the next digit in the result. 
Result so far: 364982.7904761
Subtract 210 from 400 to get 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

Going ahead to step 16:
If we divide 1900 by 210, we get 9 and a remainder of 10.
Write down 9 as next digit of the result. 
Result so far: 364982.79047619
If we subtract 1890 from 1900, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

In conclusion, the division gives 364982.79047619 with a balance of 1e-08.