We look at the division of 83960104 by 658 
The aim is to understand the frequency of 658 in 83960104.

Moving on to step 1:
When dividing 8 by 658, we get 0 with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Include the next digit (3) from the dividend after 8, then repeat: 83 / 658

Advancing to step 2:
If we divide 83 by 658, we get 0 and a remainder of 83.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 83, we end up with 83.
Fetch the next digit (9) from the dividend, attach it to 83 and continue: 839 / 658

Step 3:
If we divide 839 by 658, we get 1 and a remainder of 181.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 658 from 839, we get 181.
Take the next digit (6) from the dividend and append it to 181, then repeat: 1816 / 658

On to step 4:
1816 divided by 658 is 2 with a remainder of 500.
Put 2 as the next digit of the answer. 
Result so far: 12.0
The remainder is 500 after subtracting 1316 from 1816.
Fetch the next digit (0) from the dividend, attach it to 500 and continue: 5000 / 658

Advancing to step 5:
If we divide 5000 by 658, we get 7 and a remainder of 394.
Record the quotient 7 as the next digit in the result. 
Result so far: 127.0
Subtracting 4606 from 5000 leaves us with 394.
Append the next digit (1) from the dividend to 394 and continue with: 3941 / 658

Going ahead to step 6:
The number 658 fits into 3941 5 times, leaving a remainder of 651.
The number 5 becomes the next digit in our result. 
Result so far: 1275.0
The remainder is 651 after subtracting 3290 from 3941.
Bring next digit (0) of the dividend behind the 651 and repeat the process: 6510 / 658

On to step 7:
The number 658 fits into 6510 9 times, leaving a remainder of 588.
Put 9 as the next digit of the answer. 
Result so far: 12759.0
Deduct 5922 from 6510 and we're left with 588.
Bring next digit (4) of the dividend behind the 588 and repeat the process: 5884 / 658

Step 8:
When dividing 5884 by 658, we get 8 with a remainder of 620.
Use 8 as the next digit of our solution. 
Result so far: 127598.0
Deduct 5264 from 5884 and we're left with 620.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6200, and continue the process.

Let's proceed to step 9:
The number 658 fits into 6200 9 times, leaving a remainder of 278.
The next digit of our result is 9. 
Result so far: 127598.9
Subtract 5922 from 6200 to get 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Moving on to step 10:
The number 658 fits into 2780 4 times, leaving a remainder of 148.
The number 4 becomes the next digit in our result. 
Result so far: 127598.94
Subtract 2632 from 2780 to get 148.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

On to step 11:
When dividing 1480 by 658, we get 2 with a remainder of 164.
Record the quotient 2 as the next digit in the result. 
Result so far: 127598.942
If we take 1316 away from 1480, we end up with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Let's proceed to step 12:
1640 divided by 658 is 2 with a remainder of 324.
Write down 2 as next digit of the result. 
Result so far: 127598.9422
If we take 1316 away from 1640, we end up with 324.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3240, and continue the process.

After the division, we end up with 127598.9422 and a remainder of 0.00324.