We look at the division of 112547 by 90 
The aim is to understand the frequency of 90 in 112547.

Going ahead to step 1:
When dividing 1 by 90, we get 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (1) of the dividend behind the 1 and repeat the process: 11 / 90

Let's proceed to step 2:
The number 90 fits into 11 0 times, leaving a remainder of 11.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 11 leaves us with 11.
Grab the next digit (2) from the dividend, add it to 11, then carry on: 112 / 90

Going ahead to step 3:
When dividing 112 by 90, we get 1 with a remainder of 22.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 22 after subtracting 90 from 112.
Grab the next digit (5) from the dividend, add it to 22, then carry on: 225 / 90

Advancing to step 4:
90 can be fit into 225 2 times, resulting in a remainder of 45.
The next digit of our result is 2. 
Result so far: 12.0
If we subtract 180 from 225, we get 45.
Take the next digit (4) from the dividend and append it to 45, then repeat: 454 / 90

On to step 5:
454 divided by 90 is 5 with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 125.0
Deduct 450 from 454 and we're left with 4.
Bring next digit (7) of the dividend behind the 4 and repeat the process: 47 / 90

Step 6:
47 divided by 90 is 0 with a remainder of 47.
The number 0 becomes the next digit in our result. 
Result so far: 1250.0
If we take 0 away from 47, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Advancing to step 7:
When dividing 470 by 90, we get 5 with a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 1250.5
Subtracting 450 from 470 leaves us with 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:
If we divide 200 by 90, we get 2 and a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 1250.52
Subtract 180 from 200 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.

Step 9:
The number 90 fits into 200 2 times, leaving a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 1250.522
If we subtract 180 from 200, we 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.

In conclusion, the division gives 1250.522 with a balance of 0.002.