Let's divide 786948 by 90
The aim is to understand the frequency of 90 in 786948.

Advancing to step 1:
When dividing 7 by 90, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Grab the next digit (8) from the dividend, add it to 7, then carry on: 78 / 90

Step 2:
When dividing 78 by 90, we get 0 with a remainder of 78.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 78 to get 78.
Take the next digit (6) from the dividend and append it to 78, then repeat: 786 / 90

On to step 3:
When dividing 786 by 90, we get 8 with a remainder of 66.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 720 from 786 to get 66.
Fetch the next digit (9) from the dividend, attach it to 66 and continue: 669 / 90

Advancing to step 4:
90 goes into 669 7 times with a remainder of 39.
The next digit of our result is 7. 
Result so far: 87.0
Subtract 630 from 669 to get 39.
Include the next digit (4) from the dividend after 39, then repeat: 394 / 90

Advancing to step 5:
394 divided by 90 is 4 with a remainder of 34.
Record the quotient 4 as the next digit in the result. 
Result so far: 874.0
If we subtract 360 from 394, we get 34.
Take the next digit (8) from the dividend and append it to 34, then repeat: 348 / 90

Going ahead to step 6:
348 divided by 90 is 3 with a remainder of 78.
Write down 3 as next digit of the result. 
Result so far: 8743.0
The remainder is 78 after subtracting 270 from 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Moving on to step 7:
When dividing 780 by 90, we get 8 with a remainder of 60.
The next digit of our result is 8. 
Result so far: 8743.8
If we take 720 away from 780, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Let's proceed to step 8:
The number 90 fits into 600 6 times, leaving a remainder of 60.
The number 6 becomes the next digit in our result. 
Result so far: 8743.86
If we take 540 away from 600, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Moving on to step 9:
90 can be fit into 600 6 times, resulting in a remainder of 60.
Put 6 as the next digit of the answer. 
Result so far: 8743.866
If we subtract 540 from 600, we get 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

The quotient of the division is 8743.866, and the remainder is 0.006.