We look at the division of 122130 by 57 
The aim is to understand the frequency of 57 in 122130.

On to step 1:
57 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 57

Let's proceed to step 2:
If we divide 12 by 57, we get 0 and a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 12, we end up with 12.
Bring next digit (2) of the dividend behind the 12 and repeat the process: 122 / 57

On to step 3:
57 goes into 122 2 times with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 114 from 122 and we're left with 8.
Bring next digit (1) of the dividend behind the 8 and repeat the process: 81 / 57

On to step 4:
When dividing 81 by 57, we get 1 with a remainder of 24.
The next digit of our result is 1. 
Result so far: 21.0
Deduct 57 from 81 and we're left with 24.
Append the next digit (3) from the dividend to 24 and continue with: 243 / 57

Advancing to step 5:
57 goes into 243 4 times with a remainder of 15.
The next digit of our result is 4. 
Result so far: 214.0
If we subtract 228 from 243, we get 15.
Include the next digit (0) from the dividend after 15, then repeat: 150 / 57

On to step 6:
57 goes into 150 2 times with a remainder of 36.
Put 2 as the next digit of the answer. 
Result so far: 2142.0
Subtracting 114 from 150 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 7:
When dividing 360 by 57, we get 6 with a remainder of 18.
The number 6 becomes the next digit in our result. 
Result so far: 2142.6
Subtracting 342 from 360 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 8:
The number 57 fits into 180 3 times, leaving a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 2142.63
Deduct 171 from 180 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 9:
The number 57 fits into 90 1 times, leaving a remainder of 33.
The number 1 becomes the next digit in our result. 
Result so far: 2142.631
Subtracting 57 from 90 leaves us with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

On to step 10:
If we divide 330 by 57, we get 5 and a remainder of 45.
Write down 5 as next digit of the result. 
Result so far: 2142.6315
If we take 285 away from 330, we end up with 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Let's proceed to step 11:
When dividing 450 by 57, we get 7 with a remainder of 51.
The next digit of our result is 7. 
Result so far: 2142.63157
Subtract 399 from 450 to get 51.
Since there are no more digits in the dividend, we add a zero to the remainder making it 510, and continue the process.

Advancing to step 12:
When dividing 510 by 57, we get 8 with a remainder of 54.
The next digit of our result is 8. 
Result so far: 2142.631578
Subtract 456 from 510 to get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

On to step 13:
If we divide 540 by 57, we get 9 and a remainder of 27.
Use 9 as the next digit of our solution. 
Result so far: 2142.6315789
Subtract 513 from 540 to get 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Moving on to step 14:
270 divided by 57 is 4 with a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 2142.63157894
Deduct 228 from 270 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

After the division, we end up with 2142.63157894 and a remainder of 4.2e-08.