We look at the division of 64358038 by 257 
The aim is to understand the frequency of 257 in 64358038.

Going ahead to step 1:
257 goes into 6 0 times with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 257

Moving on to step 2:
257 goes into 64 0 times with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 64 to get 64.
Append the next digit (3) from the dividend to 64 and continue with: 643 / 257

Going ahead to step 3:
When dividing 643 by 257, we get 2 with a remainder of 129.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 514 away from 643, we end up with 129.
Bring next digit (5) of the dividend behind the 129 and repeat the process: 1295 / 257

Moving on to step 4:
257 goes into 1295 5 times with a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 25.0
Subtract 1285 from 1295 to get 10.
Grab the next digit (8) from the dividend, add it to 10, then carry on: 108 / 257

Let's proceed to step 5:
108 divided by 257 is 0 with a remainder of 108.
Write down 0 as next digit of the result. 
Result so far: 250.0
Subtracting 0 from 108 leaves us with 108.
Grab the next digit (0) from the dividend, add it to 108, then carry on: 1080 / 257

Let's proceed to step 6:
The number 257 fits into 1080 4 times, leaving a remainder of 52.
Record the quotient 4 as the next digit in the result. 
Result so far: 2504.0
If we take 1028 away from 1080, we end up with 52.
Include the next digit (3) from the dividend after 52, then repeat: 523 / 257

On to step 7:
When dividing 523 by 257, we get 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 25042.0
Subtract 514 from 523 to get 9.
Fetch the next digit (8) from the dividend, attach it to 9 and continue: 98 / 257

Advancing to step 8:
257 can be fit into 98 0 times, resulting in a remainder of 98.
The next digit of our result is 0. 
Result so far: 250420.0
Deduct 0 from 98 and we're left with 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Moving on to step 9:
980 divided by 257 is 3 with a remainder of 209.
Use 3 as the next digit of our solution. 
Result so far: 250420.3
If we subtract 771 from 980, we get 209.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2090, and continue the process.

Going ahead to step 10:
257 can be fit into 2090 8 times, resulting in a remainder of 34.
The number 8 becomes the next digit in our result. 
Result so far: 250420.38
The remainder is 34 after subtracting 2056 from 2090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 11:
340 divided by 257 is 1 with a remainder of 83.
Record the quotient 1 as the next digit in the result. 
Result so far: 250420.381
If we subtract 257 from 340, we get 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Moving on to step 12:
The number 257 fits into 830 3 times, leaving a remainder of 59.
Record the quotient 3 as the next digit in the result. 
Result so far: 250420.3813
Subtracting 771 from 830 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Moving on to step 13:
If we divide 590 by 257, we get 2 and a remainder of 76.
Write down 2 as next digit of the result. 
Result so far: 250420.38132
Deduct 514 from 590 and we're left with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Advancing to step 14:
257 can be fit into 760 2 times, resulting in a remainder of 246.
The next digit of our result is 2. 
Result so far: 250420.381322
If we subtract 514 from 760, we get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

The final outcome is 250420.381322, with a leftover of 2.46e-05.