74989 divided by 90 
The aim is to understand the frequency of 90 in 74989.

On to step 1:
If we divide 7 by 90, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 90

Moving on to step 2:
90 can be fit into 74 0 times, resulting in a remainder of 74.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 74, we get 74.
Include the next digit (9) from the dividend after 74, then repeat: 749 / 90

Let's proceed to step 3:
When dividing 749 by 90, we get 8 with a remainder of 29.
The next digit of our result is 8. 
Result so far: 8.0
Subtract 720 from 749 to get 29.
Include the next digit (8) from the dividend after 29, then repeat: 298 / 90

Moving on to step 4:
90 goes into 298 3 times with a remainder of 28.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
If we subtract 270 from 298, we get 28.
Fetch the next digit (9) from the dividend, attach it to 28 and continue: 289 / 90

Advancing to step 5:
90 goes into 289 3 times with a remainder of 19.
Put 3 as the next digit of the answer. 
Result so far: 833.0
If we subtract 270 from 289, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 6:
If we divide 190 by 90, we get 2 and a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 833.2
The remainder is 10 after subtracting 180 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
100 divided by 90 is 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 833.21
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 90 fits into 100 1 times, leaving a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 833.211
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 833.211 and a remainder of 0.001.