Let's divide 636161 by 61
The aim is to understand the frequency of 61 in 636161.

Step 1:
If we divide 6 by 61, we get 0 and a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Grab the next digit (3) from the dividend, add it to 6, then carry on: 63 / 61

Moving on to step 2:
When dividing 63 by 61, we get 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 61 away from 63, we end up with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 61

Going ahead to step 3:
61 can be fit into 26 0 times, resulting in a remainder of 26.
The next digit of our result is 0. 
Result so far: 10.0
If we subtract 0 from 26, we get 26.
Take the next digit (1) from the dividend and append it to 26, then repeat: 261 / 61

On to step 4:
261 divided by 61 is 4 with a remainder of 17.
Record the quotient 4 as the next digit in the result. 
Result so far: 104.0
Subtract 244 from 261 to get 17.
Take the next digit (6) from the dividend and append it to 17, then repeat: 176 / 61

Advancing to step 5:
The number 61 fits into 176 2 times, leaving a remainder of 54.
Write down 2 as next digit of the result. 
Result so far: 1042.0
If we subtract 122 from 176, we get 54.
Grab the next digit (1) from the dividend, add it to 54, then carry on: 541 / 61

Going ahead to step 6:
The number 61 fits into 541 8 times, leaving a remainder of 53.
Put 8 as the next digit of the answer. 
Result so far: 10428.0
Subtracting 488 from 541 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Moving on to step 7:
530 divided by 61 is 8 with a remainder of 42.
The number 8 becomes the next digit in our result. 
Result so far: 10428.8
Deduct 488 from 530 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.

Step 8:
61 can be fit into 420 6 times, resulting in a remainder of 54.
Put 6 as the next digit of the answer. 
Result so far: 10428.86
Subtract 366 from 420 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.

Step 9:
540 divided by 61 is 8 with a remainder of 52.
The next digit of our result is 8. 
Result so far: 10428.868
Subtracting 488 from 540 leaves us 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 goes into 520 8 times with a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 10428.8688
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.

After the division, we end up with 10428.8688 and a remainder of 0.00032.