64609676 divided by 397 
The aim is to understand the frequency of 397 in 64609676.

Step 1:
397 goes into 6 0 times with 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.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 397

Going ahead to step 2:
The number 397 fits into 64 0 times, leaving a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 64 after subtracting 0 from 64.
Fetch the next digit (6) from the dividend, attach it to 64 and continue: 646 / 397

Advancing to step 3:
397 goes into 646 1 times with a remainder of 249.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 397 away from 646, we end up with 249.
Include the next digit (0) from the dividend after 249, then repeat: 2490 / 397

Let's proceed to step 4:
The number 397 fits into 2490 6 times, leaving a remainder of 108.
Put 6 as the next digit of the answer. 
Result so far: 16.0
Subtracting 2382 from 2490 leaves us with 108.
Bring next digit (9) of the dividend behind the 108 and repeat the process: 1089 / 397

Moving on to step 5:
1089 divided by 397 is 2 with a remainder of 295.
Put 2 as the next digit of the answer. 
Result so far: 162.0
Subtracting 794 from 1089 leaves us with 295.
Append the next digit (6) from the dividend to 295 and continue with: 2956 / 397

Going ahead to step 6:
When dividing 2956 by 397, we get 7 with a remainder of 177.
Write down 7 as next digit of the result. 
Result so far: 1627.0
The remainder is 177 after subtracting 2779 from 2956.
Grab the next digit (7) from the dividend, add it to 177, then carry on: 1777 / 397

Let's proceed to step 7:
The number 397 fits into 1777 4 times, leaving a remainder of 189.
Write down 4 as next digit of the result. 
Result so far: 16274.0
Subtracting 1588 from 1777 leaves us with 189.
Include the next digit (6) from the dividend after 189, then repeat: 1896 / 397

On to step 8:
When dividing 1896 by 397, we get 4 with a remainder of 308.
The next digit of our result is 4. 
Result so far: 162744.0
If we take 1588 away from 1896, we end up with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Going ahead to step 9:
3080 divided by 397 is 7 with a remainder of 301.
The next digit of our result is 7. 
Result so far: 162744.7
If we take 2779 away from 3080, we end up with 301.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3010, and continue the process.

On to step 10:
The number 397 fits into 3010 7 times, leaving a remainder of 231.
The number 7 becomes the next digit in our result. 
Result so far: 162744.77
Deduct 2779 from 3010 and we're left with 231.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2310, and continue the process.

The final result is 162744.77 with a remainder of 0.231.