We look at the division of 531780 by 61 
The aim is to understand the frequency of 61 in 531780.

On to step 1:
61 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 61

Moving on to step 2:
61 goes into 53 0 times with a remainder of 53.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 53 leaves us with 53.
Bring next digit (1) of the dividend behind the 53 and repeat the process: 531 / 61

Going ahead to step 3:
If we divide 531 by 61, we get 8 and a remainder of 43.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 488 away from 531, we end up with 43.
Bring next digit (7) of the dividend behind the 43 and repeat the process: 437 / 61

Going ahead to step 4:
61 goes into 437 7 times with a remainder of 10.
The next digit of our result is 7. 
Result so far: 87.0
Subtract 427 from 437 to get 10.
Fetch the next digit (8) from the dividend, attach it to 10 and continue: 108 / 61

Moving on to step 5:
If we divide 108 by 61, we get 1 and a remainder of 47.
Record the quotient 1 as the next digit in the result. 
Result so far: 871.0
If we take 61 away from 108, we end up with 47.
Take the next digit (0) from the dividend and append it to 47, then repeat: 470 / 61

Going ahead to step 6:
When dividing 470 by 61, we get 7 with a remainder of 43.
Put 7 as the next digit of the answer. 
Result so far: 8717.0
Deduct 427 from 470 and we're left with 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Going ahead to step 7:
The number 61 fits into 430 7 times, leaving a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 8717.7
If we subtract 427 from 430, 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.

Let's proceed to step 8:
The number 61 fits into 30 0 times, leaving a remainder of 30.
Use 0 as the next digit of our solution. 
Result so far: 8717.7
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.

Let's proceed to step 9:
If we divide 300 by 61, we get 4 and a remainder of 56.
Record the quotient 4 as the next digit in the result. 
Result so far: 8717.704
The remainder is 56 after subtracting 244 from 300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Going ahead to step 10:
The number 61 fits into 560 9 times, leaving a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 8717.7049
If we subtract 549 from 560, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
61 goes into 110 1 times with a remainder of 49.
The next digit of our result is 1. 
Result so far: 8717.70491
Subtract 61 from 110 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Going ahead to step 12:
61 goes into 490 8 times with a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 8717.704918
Subtracting 488 from 490 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 13:
61 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 8717.704918
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 14:
If we divide 200 by 61, we get 3 and a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 8717.70491803
Subtracting 183 from 200 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Our division results in 8717.70491803 with a remaining 1.7e-08.