We look at the division of 913302 by 90 
The aim is to understand the frequency of 90 in 913302.

Step 1:
When dividing 9 by 90, we get 0 with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 90

On to step 2:
91 divided by 90 is 1 with a remainder of 1.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 90 from 91 leaves us with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 90

Step 3:
13 divided by 90 is 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 13, we get 13.
Include the next digit (3) from the dividend after 13, then repeat: 133 / 90

Advancing to step 4:
When dividing 133 by 90, we get 1 with a remainder of 43.
Write down 1 as next digit of the result. 
Result so far: 101.0
Subtracting 90 from 133 leaves us with 43.
Append the next digit (0) from the dividend to 43 and continue with: 430 / 90

Let's proceed to step 5:
430 divided by 90 is 4 with a remainder of 70.
Put 4 as the next digit of the answer. 
Result so far: 1014.0
If we take 360 away from 430, we end up with 70.
Include the next digit (2) from the dividend after 70, then repeat: 702 / 90

On to step 6:
90 goes into 702 7 times with a remainder of 72.
Put 7 as the next digit of the answer. 
Result so far: 10147.0
Subtract 630 from 702 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

On to step 7:
90 can be fit into 720 8 times, resulting in a remainder of 0.
The next digit of our result is 8. 
Result so far: 10147.8
If we subtract 720 from 720, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
0 divided by 90 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 10147.8
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
0 divided by 90 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 10147.8
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The quotient of the division is 10147.8, and the remainder is 0.0.