758 ÷ 90 
The aim is to understand the frequency of 90 in 758.

Moving on to step 1:
90 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 90

Step 2:
When dividing 75 by 90, we get 0 with a remainder of 75.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 75, we end up with 75.
Grab the next digit (8) from the dividend, add it to 75, then carry on: 758 / 90

Going ahead to step 3:
90 can be fit into 758 8 times, resulting in a remainder of 38.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 720 away from 758, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Advancing to step 4:
The number 90 fits into 380 4 times, leaving a remainder of 20.
Record the quotient 4 as the next digit in the result. 
Result so far: 8.4
Deduct 360 from 380 and we're left with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Step 5:
90 goes into 200 2 times with a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 8.42
If we subtract 180 from 200, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 6:
If we divide 200 by 90, we get 2 and a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 8.422
If we take 180 away from 200, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The quotient of the division is 8.422, and the remainder is 0.002.