We look at the division of 81280724 by 61 
The aim is to understand the frequency of 61 in 81280724.

On to step 1:
61 goes into 8 0 times with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 61

Step 2:
If we divide 81 by 61, we get 1 and a remainder of 20.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 61 from 81 to get 20.
Bring next digit (2) of the dividend behind the 20 and repeat the process: 202 / 61

Step 3:
If we divide 202 by 61, we get 3 and a remainder of 19.
The next digit of our result is 3. 
Result so far: 13.0
If we subtract 183 from 202, we get 19.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 61

Going ahead to step 4:
61 can be fit into 198 3 times, resulting in a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 133.0
The remainder is 15 after subtracting 183 from 198.
Include the next digit (0) from the dividend after 15, then repeat: 150 / 61

Let's proceed to step 5:
If we divide 150 by 61, we get 2 and a remainder of 28.
Put 2 as the next digit of the answer. 
Result so far: 1332.0
Subtract 122 from 150 to get 28.
Take the next digit (7) from the dividend and append it to 28, then repeat: 287 / 61

Advancing to step 6:
61 goes into 287 4 times with a remainder of 43.
Use 4 as the next digit of our solution. 
Result so far: 13324.0
Deduct 244 from 287 and we're left with 43.
Fetch the next digit (2) from the dividend, attach it to 43 and continue: 432 / 61

Moving on to step 7:
The number 61 fits into 432 7 times, leaving a remainder of 5.
Use 7 as the next digit of our solution. 
Result so far: 133247.0
If we subtract 427 from 432, we get 5.
Grab the next digit (4) from the dividend, add it to 5, then carry on: 54 / 61

Let's proceed to step 8:
When dividing 54 by 61, we get 0 with a remainder of 54.
The next digit of our result is 0. 
Result so far: 1332470.0
Subtract 0 from 54 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.

Moving on to step 9:
When dividing 540 by 61, we get 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 1332470.8
If we take 488 away from 540, we end up with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Moving on to step 10:
61 can be fit into 520 8 times, resulting in a remainder of 32.
Write down 8 as next digit of the result. 
Result so far: 1332470.88
The remainder is 32 after subtracting 488 from 520.
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 1332470.88, with a leftover of 0.032.