We're dividing 124113 by 90 
The aim is to understand the frequency of 90 in 124113.

Let's proceed 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
The remainder is 1 after subtracting 0 from 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 90

Moving on to step 2:
The number 90 fits into 12 0 times, leaving a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 12 to get 12.
Include the next digit (4) from the dividend after 12, then repeat: 124 / 90

On to step 3:
90 goes into 124 1 times with a remainder of 34.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 90 away from 124, we end up with 34.
Take the next digit (1) from the dividend and append it to 34, then repeat: 341 / 90

Step 4:
If we divide 341 by 90, we get 3 and a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 13.0
If we take 270 away from 341, we end up with 71.
Append the next digit (1) from the dividend to 71 and continue with: 711 / 90

Moving on to step 5:
The number 90 fits into 711 7 times, leaving a remainder of 81.
Put 7 as the next digit of the answer. 
Result so far: 137.0
Subtract 630 from 711 to get 81.
Grab the next digit (3) from the dividend, add it to 81, then carry on: 813 / 90

Advancing to step 6:
When dividing 813 by 90, we get 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 1379.0
Subtract 810 from 813 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
90 can be fit into 30 0 times, resulting in a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 1379.0
If we take 0 away from 30, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 1379.03
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
300 divided by 90 is 3 with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 1379.033
If we subtract 270 from 300, we get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

After the division, we end up with 1379.033 and a remainder of 0.003.