We look at the division of 196680 by 90 
The aim is to understand the frequency of 90 in 196680.

Going ahead to step 1:
If we divide 1 by 90, we get 0 and a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Bring next digit (9) of the dividend behind the 1 and repeat the process: 19 / 90

Going ahead to step 2:
If we divide 19 by 90, we get 0 and a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 19, we get 19.
Include the next digit (6) from the dividend after 19, then repeat: 196 / 90

Let's proceed to step 3:
The number 90 fits into 196 2 times, leaving a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 180 away from 196, we end up with 16.
Grab the next digit (6) from the dividend, add it to 16, then carry on: 166 / 90

Step 4:
If we divide 166 by 90, we get 1 and a remainder of 76.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
If we take 90 away from 166, we end up with 76.
Fetch the next digit (8) from the dividend, attach it to 76 and continue: 768 / 90

Let's proceed to step 5:
768 divided by 90 is 8 with a remainder of 48.
The number 8 becomes the next digit in our result. 
Result so far: 218.0
Subtract 720 from 768 to get 48.
Append the next digit (0) from the dividend to 48 and continue with: 480 / 90

Let's proceed to step 6:
When dividing 480 by 90, we get 5 with a remainder of 30.
Use 5 as the next digit of our solution. 
Result so far: 2185.0
If we subtract 450 from 480, we 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.

On to step 7:
300 divided by 90 is 3 with a remainder of 30.
The next digit of our result is 3. 
Result so far: 2185.3
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.

On to step 8:
The number 90 fits into 300 3 times, leaving a remainder of 30.
The next digit of our result is 3. 
Result so far: 2185.33
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.

The quotient of the division is 2185.33, and the remainder is 0.03.