We look at the division of 748701 by 90 
The aim is to understand the frequency of 90 in 748701.

Moving on to step 1:
90 can be fit into 7 0 times, resulting in a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (4) from the dividend and append it to 7, then repeat: 74 / 90

Advancing to step 2:
If we divide 74 by 90, we get 0 and a remainder of 74.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 74 to get 74.
Fetch the next digit (8) from the dividend, attach it to 74 and continue: 748 / 90

Advancing to step 3:
When dividing 748 by 90, we get 8 with a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 8.0
If we subtract 720 from 748, we get 28.
Take the next digit (7) from the dividend and append it to 28, then repeat: 287 / 90

Let's proceed to step 4:
90 goes into 287 3 times with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 83.0
If we take 270 away from 287, we end up with 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 90

Advancing to step 5:
If we divide 170 by 90, we get 1 and a remainder of 80.
Put 1 as the next digit of the answer. 
Result so far: 831.0
Subtracting 90 from 170 leaves us with 80.
Take the next digit (1) from the dividend and append it to 80, then repeat: 801 / 90

Moving on to step 6:
If we divide 801 by 90, we get 8 and a remainder of 81.
Write down 8 as next digit of the result. 
Result so far: 8318.0
Subtract 720 from 801 to get 81.
Since there are no more digits in the dividend, we add a zero to the remainder making it 810, and continue the process.

Going ahead to step 7:
The number 90 fits into 810 9 times, leaving a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 8318.9
Deduct 810 from 810 and we're left 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.

Going ahead to step 8:
If we divide 0 by 90, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 8318.9
Deduct 0 from 0 and we're left 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.

Going ahead to step 9:
0 divided by 90 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 8318.9
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.

The final result is 8318.9 with a remainder of 0.0.