64604621 ÷ 465 
The aim is to understand the frequency of 465 in 64604621.

Going ahead to step 1:
If we divide 6 by 465, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 465

Going ahead to step 2:
The number 465 fits into 64 0 times, leaving a remainder of 64.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 64, we end up with 64.
Bring next digit (6) of the dividend behind the 64 and repeat the process: 646 / 465

On to step 3:
465 goes into 646 1 times with a remainder of 181.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 465 from 646 and we're left with 181.
Bring next digit (0) of the dividend behind the 181 and repeat the process: 1810 / 465

Advancing to step 4:
The number 465 fits into 1810 3 times, leaving a remainder of 415.
Use 3 as the next digit of our solution. 
Result so far: 13.0
If we take 1395 away from 1810, we end up with 415.
Append the next digit (4) from the dividend to 415 and continue with: 4154 / 465

Step 5:
465 can be fit into 4154 8 times, resulting in a remainder of 434.
The next digit of our result is 8. 
Result so far: 138.0
If we take 3720 away from 4154, we end up with 434.
Take the next digit (6) from the dividend and append it to 434, then repeat: 4346 / 465

Advancing to step 6:
If we divide 4346 by 465, we get 9 and a remainder of 161.
The next digit of our result is 9. 
Result so far: 1389.0
Subtracting 4185 from 4346 leaves us with 161.
Append the next digit (2) from the dividend to 161 and continue with: 1612 / 465

Let's proceed to step 7:
When dividing 1612 by 465, we get 3 with a remainder of 217.
The next digit of our result is 3. 
Result so far: 13893.0
If we subtract 1395 from 1612, we get 217.
Fetch the next digit (1) from the dividend, attach it to 217 and continue: 2171 / 465

Let's proceed to step 8:
2171 divided by 465 is 4 with a remainder of 311.
Record the quotient 4 as the next digit in the result. 
Result so far: 138934.0
The remainder is 311 after subtracting 1860 from 2171.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3110, and continue the process.

Step 9:
3110 divided by 465 is 6 with a remainder of 320.
The number 6 becomes the next digit in our result. 
Result so far: 138934.6
Subtracting 2790 from 3110 leaves us with 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

Moving on to step 10:
3200 divided by 465 is 6 with a remainder of 410.
Put 6 as the next digit of the answer. 
Result so far: 138934.66
Subtracting 2790 from 3200 leaves us with 410.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

The final result is 138934.66 with a remainder of 0.41.