We're dividing 948216 by 90 
The aim is to understand the frequency of 90 in 948216.

On to step 1:
90 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (4) from the dividend, attach it to 9 and continue: 94 / 90

Going ahead to step 2:
90 can be fit into 94 1 times, resulting in a remainder of 4.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 90 from 94, we get 4.
Include the next digit (8) from the dividend after 4, then repeat: 48 / 90

Moving on to step 3:
48 divided by 90 is 0 with a remainder of 48.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 48, we get 48.
Grab the next digit (2) from the dividend, add it to 48, then carry on: 482 / 90

On to step 4:
90 goes into 482 5 times with a remainder of 32.
Write down 5 as next digit of the result. 
Result so far: 105.0
Subtracting 450 from 482 leaves us with 32.
Fetch the next digit (1) from the dividend, attach it to 32 and continue: 321 / 90

Let's proceed to step 5:
When dividing 321 by 90, we get 3 with a remainder of 51.
Use 3 as the next digit of our solution. 
Result so far: 1053.0
Deduct 270 from 321 and we're left with 51.
Append the next digit (6) from the dividend to 51 and continue with: 516 / 90

Let's proceed to step 6:
516 divided by 90 is 5 with a remainder of 66.
Use 5 as the next digit of our solution. 
Result so far: 10535.0
If we take 450 away from 516, we end up with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 7:
660 divided by 90 is 7 with a remainder of 30.
Record the quotient 7 as the next digit in the result. 
Result so far: 10535.7
Subtracting 630 from 660 leaves us 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.

Step 8:
300 divided by 90 is 3 with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 10535.73
Subtract 270 from 300 to 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:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 10535.733
Deduct 270 from 300 and we're left 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.

The final outcome is 10535.733, with a leftover of 0.003.