We look at the division of 591519 by 61 
The aim is to understand the frequency of 61 in 591519.

Let's proceed to step 1:
61 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 61

Let's proceed to step 2:
When dividing 59 by 61, we get 0 with a remainder of 59.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 59, we end up with 59.
Bring next digit (1) of the dividend behind the 59 and repeat the process: 591 / 61

Advancing to step 3:
61 goes into 591 9 times with a remainder of 42.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtracting 549 from 591 leaves us with 42.
Bring next digit (5) of the dividend behind the 42 and repeat the process: 425 / 61

Moving on to step 4:
When dividing 425 by 61, we get 6 with a remainder of 59.
Put 6 as the next digit of the answer. 
Result so far: 96.0
If we subtract 366 from 425, we get 59.
Append the next digit (1) from the dividend to 59 and continue with: 591 / 61

Going ahead to step 5:
The number 61 fits into 591 9 times, leaving a remainder of 42.
The next digit of our result is 9. 
Result so far: 969.0
If we subtract 549 from 591, we get 42.
Grab the next digit (9) from the dividend, add it to 42, then carry on: 429 / 61

Step 6:
61 goes into 429 7 times with a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 9697.0
The remainder is 2 after subtracting 427 from 429.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 7:
61 goes into 20 0 times with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 9697.0
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.

Going ahead to step 8:
The number 61 fits into 200 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 9697.03
Deduct 183 from 200 and we're left 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.

Going ahead to step 9:
If we divide 170 by 61, we get 2 and a remainder of 48.
Record the quotient 2 as the next digit in the result. 
Result so far: 9697.032
The remainder is 48 after subtracting 122 from 170.
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:
If we divide 480 by 61, we get 7 and a remainder of 53.
Write down 7 as next digit of the result. 
Result so far: 9697.0327
The remainder is 53 after subtracting 427 from 480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Going ahead to step 11:
The number 61 fits into 530 8 times, leaving a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 9697.03278
If we take 488 away from 530, we end up 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.

Step 12:
The number 61 fits into 420 6 times, leaving a remainder of 54.
Put 6 as the next digit of the answer. 
Result so far: 9697.032786
If we take 366 away from 420, we end up with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Moving on to step 13:
When dividing 540 by 61, we get 8 with a remainder of 52.
Record the quotient 8 as the next digit in the result. 
Result so far: 9697.0327868
Subtract 488 from 540 to get 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

On to step 14:
When dividing 520 by 61, we get 8 with a remainder of 32.
The next digit of our result is 8. 
Result so far: 9697.03278688
If we take 488 away from 520, we end up with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

The final outcome is 9697.03278688, with a leftover of 3.2e-08.