118561 divided by 90 
The aim is to understand the frequency of 90 in 118561.

Advancing to step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 90

Moving on to step 2:
The number 90 fits into 11 0 times, leaving a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 11 and we're left with 11.
Bring next digit (8) of the dividend behind the 11 and repeat the process: 118 / 90

Going ahead to step 3:
When dividing 118 by 90, we get 1 with a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 90 from 118 and we're left with 28.
Bring next digit (5) of the dividend behind the 28 and repeat the process: 285 / 90

Advancing to step 4:
The number 90 fits into 285 3 times, leaving a remainder of 15.
Write down 3 as next digit of the result. 
Result so far: 13.0
Subtracting 270 from 285 leaves us with 15.
Grab the next digit (6) from the dividend, add it to 15, then carry on: 156 / 90

Let's proceed to step 5:
If we divide 156 by 90, we get 1 and a remainder of 66.
Use 1 as the next digit of our solution. 
Result so far: 131.0
Subtracting 90 from 156 leaves us with 66.
Append the next digit (1) from the dividend to 66 and continue with: 661 / 90

Moving on to step 6:
If we divide 661 by 90, we get 7 and a remainder of 31.
Write down 7 as next digit of the result. 
Result so far: 1317.0
Deduct 630 from 661 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 7:
310 divided by 90 is 3 with a remainder of 40.
The number 3 becomes the next digit in our result. 
Result so far: 1317.3
If we take 270 away from 310, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
90 can be fit into 400 4 times, resulting in a remainder of 40.
Use 4 as the next digit of our solution. 
Result so far: 1317.34
Deduct 360 from 400 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 9:
When dividing 400 by 90, we get 4 with a remainder of 40.
The number 4 becomes the next digit in our result. 
Result so far: 1317.344
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

The final outcome is 1317.344, with a leftover of 0.004.