We look at the division of 772998 by 57 
The aim is to understand the frequency of 57 in 772998.

Step 1:
When dividing 7 by 57, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 57

On to step 2:
57 can be fit into 77 1 times, resulting in a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 57 from 77 to get 20.
Append the next digit (2) from the dividend to 20 and continue with: 202 / 57

Advancing to step 3:
When dividing 202 by 57, we get 3 with a remainder of 31.
Use 3 as the next digit of our solution. 
Result so far: 13.0
Subtract 171 from 202 to get 31.
Fetch the next digit (9) from the dividend, attach it to 31 and continue: 319 / 57

Advancing to step 4:
319 divided by 57 is 5 with a remainder of 34.
Put 5 as the next digit of the answer. 
Result so far: 135.0
The remainder is 34 after subtracting 285 from 319.
Append the next digit (9) from the dividend to 34 and continue with: 349 / 57

On to step 5:
349 divided by 57 is 6 with a remainder of 7.
Put 6 as the next digit of the answer. 
Result so far: 1356.0
Subtract 342 from 349 to get 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 57

On to step 6:
The number 57 fits into 78 1 times, leaving a remainder of 21.
Record the quotient 1 as the next digit in the result. 
Result so far: 13561.0
If we take 57 away from 78, we end up with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
When dividing 210 by 57, we get 3 with a remainder of 39.
The number 3 becomes the next digit in our result. 
Result so far: 13561.3
The remainder is 39 after subtracting 171 from 210.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Advancing to step 8:
When dividing 390 by 57, we get 6 with a remainder of 48.
Use 6 as the next digit of our solution. 
Result so far: 13561.36
If we take 342 away from 390, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Moving on to step 9:
57 can be fit into 480 8 times, resulting in a remainder of 24.
Record the quotient 8 as the next digit in the result. 
Result so far: 13561.368
Deduct 456 from 480 and we're left with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Moving on to step 10:
If we divide 240 by 57, we get 4 and a remainder of 12.
The next digit of our result is 4. 
Result so far: 13561.3684
Subtract 228 from 240 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 11:
The number 57 fits into 120 2 times, leaving a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 13561.36842
The remainder is 6 after subtracting 114 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
60 divided by 57 is 1 with a remainder of 3.
Put 1 as the next digit of the answer. 
Result so far: 13561.368421
Subtract 57 from 60 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 13:
30 divided by 57 is 0 with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 13561.368421
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 14:
If we divide 300 by 57, we get 5 and a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 13561.36842105
If we take 285 away from 300, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final outcome is 13561.36842105, with a leftover of 1.5e-08.