We look at the division of 571901 by 53 
The aim is to understand the frequency of 53 in 571901.

Moving on to step 1:
5 divided by 53 is 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 53

Advancing to step 2:
57 divided by 53 is 1 with a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 4 after subtracting 53 from 57.
Append the next digit (1) from the dividend to 4 and continue with: 41 / 53

Moving on to step 3:
If we divide 41 by 53, we get 0 and a remainder of 41.
Use 0 as the next digit of our solution. 
Result so far: 10.0
If we subtract 0 from 41, we get 41.
Grab the next digit (9) from the dividend, add it to 41, then carry on: 419 / 53

Step 4:
53 can be fit into 419 7 times, resulting in a remainder of 48.
Record the quotient 7 as the next digit in the result. 
Result so far: 107.0
If we subtract 371 from 419, we get 48.
Grab the next digit (0) from the dividend, add it to 48, then carry on: 480 / 53

Moving on to step 5:
If we divide 480 by 53, we get 9 and a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 1079.0
If we take 477 away from 480, we end up with 3.
Append the next digit (1) from the dividend to 3 and continue with: 31 / 53

Moving on to step 6:
If we divide 31 by 53, we get 0 and a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 10790.0
Subtract 0 from 31 to get 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

Going ahead to step 7:
When dividing 310 by 53, we get 5 with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 10790.5
Deduct 265 from 310 and we're left 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.

On to step 8:
When dividing 450 by 53, we get 8 with a remainder of 26.
Use 8 as the next digit of our solution. 
Result so far: 10790.58
Subtract 424 from 450 to get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 9:
The number 53 fits into 260 4 times, leaving a remainder of 48.
Record the quotient 4 as the next digit in the result. 
Result so far: 10790.584
The remainder is 48 after subtracting 212 from 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 10:
53 can be fit into 480 9 times, resulting in a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 10790.5849
If we subtract 477 from 480, we 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 11:
53 goes into 30 0 times with a remainder of 30.
The number 0 becomes the next digit in our result. 
Result so far: 10790.5849
Deduct 0 from 30 and we're left 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 12:
300 divided by 53 is 5 with a remainder of 35.
Put 5 as the next digit of the answer. 
Result so far: 10790.584905
Deduct 265 from 300 and we're left with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Going ahead to step 13:
The number 53 fits into 350 6 times, leaving a remainder of 32.
Write down 6 as next digit of the result. 
Result so far: 10790.5849056
The remainder is 32 after subtracting 318 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 14:
53 goes into 320 6 times with a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 10790.58490566
The remainder is 2 after subtracting 318 from 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Our division results in 10790.58490566 with a remaining 2e-09.