We divide 121148 by 90
The aim is to understand the frequency of 90 in 121148.

On to step 1:
The number 90 fits into 1 0 times, leaving a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 90

On to step 2:
When dividing 12 by 90, we get 0 with a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Grab the next digit (1) from the dividend, add it to 12, then carry on: 121 / 90

Let's proceed to step 3:
The number 90 fits into 121 1 times, leaving a remainder of 31.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 90 from 121 to get 31.
Fetch the next digit (1) from the dividend, attach it to 31 and continue: 311 / 90

Advancing to step 4:
311 divided by 90 is 3 with a remainder of 41.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
Subtracting 270 from 311 leaves us with 41.
Include the next digit (4) from the dividend after 41, then repeat: 414 / 90

Moving on to step 5:
When dividing 414 by 90, we get 4 with a remainder of 54.
Use 4 as the next digit of our solution. 
Result so far: 134.0
Subtracting 360 from 414 leaves us with 54.
Grab the next digit (8) from the dividend, add it to 54, then carry on: 548 / 90

Advancing to step 6:
90 can be fit into 548 6 times, resulting in a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 1346.0
Subtract 540 from 548 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 7:
90 can be fit into 80 0 times, resulting in a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 1346.0
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
800 divided by 90 is 8 with a remainder of 80.
Write down 8 as next digit of the result. 
Result so far: 1346.08
Subtracting 720 from 800 leaves us with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 9:
800 divided by 90 is 8 with a remainder of 80.
The number 8 becomes the next digit in our result. 
Result so far: 1346.088
If we take 720 away from 800, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Our division results in 1346.088 with a remaining 0.008.