Let's divide 938748 by 90
The aim is to understand the frequency of 90 in 938748.

Moving on to step 1:
If we divide 9 by 90, we get 0 and a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 90

Advancing to step 2:
93 divided by 90 is 1 with a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 90 from 93, we get 3.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 90

Let's proceed to step 3:
The number 90 fits into 38 0 times, leaving a remainder of 38.
Put 0 as the next digit of the answer. 
Result so far: 10.0
The remainder is 38 after subtracting 0 from 38.
Grab the next digit (7) from the dividend, add it to 38, then carry on: 387 / 90

Moving on to step 4:
90 can be fit into 387 4 times, resulting in a remainder of 27.
Put 4 as the next digit of the answer. 
Result so far: 104.0
The remainder is 27 after subtracting 360 from 387.
Fetch the next digit (4) from the dividend, attach it to 27 and continue: 274 / 90

Moving on to step 5:
If we divide 274 by 90, we get 3 and a remainder of 4.
The next digit of our result is 3. 
Result so far: 1043.0
If we subtract 270 from 274, we get 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 90

Step 6:
90 goes into 48 0 times with a remainder of 48.
Write down 0 as next digit of the result. 
Result so far: 10430.0
Subtracting 0 from 48 leaves us with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 7:
480 divided by 90 is 5 with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 10430.5
If we take 450 away from 480, we end up 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.

Advancing to step 8:
300 divided by 90 is 3 with a remainder of 30.
Record the quotient 3 as the next digit in the result. 
Result so far: 10430.53
Subtracting 270 from 300 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 9:
When dividing 300 by 90, we get 3 with a remainder of 30.
Use 3 as the next digit of our solution. 
Result so far: 10430.533
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 quotient of the division is 10430.533, and the remainder is 0.003.