99336386 divided by 90 
The aim is to understand the frequency of 90 in 99336386.

Let's proceed to step 1:
90 goes into 9 0 times with a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 90

Let's proceed to step 2:
90 can be fit into 99 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 1.0
Deduct 90 from 99 and we're left with 9.
Take the next digit (3) from the dividend and append it to 9, then repeat: 93 / 90

On to step 3:
93 divided by 90 is 1 with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
The remainder is 3 after subtracting 90 from 93.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 90

Step 4:
The number 90 fits into 33 0 times, leaving a remainder of 33.
Use 0 as the next digit of our solution. 
Result so far: 110.0
Subtract 0 from 33 to get 33.
Fetch the next digit (6) from the dividend, attach it to 33 and continue: 336 / 90

Moving on to step 5:
90 can be fit into 336 3 times, resulting in a remainder of 66.
Use 3 as the next digit of our solution. 
Result so far: 1103.0
Subtract 270 from 336 to get 66.
Grab the next digit (3) from the dividend, add it to 66, then carry on: 663 / 90

Going ahead to step 6:
The number 90 fits into 663 7 times, leaving a remainder of 33.
Put 7 as the next digit of the answer. 
Result so far: 11037.0
If we subtract 630 from 663, we get 33.
Fetch the next digit (8) from the dividend, attach it to 33 and continue: 338 / 90

On to step 7:
The number 90 fits into 338 3 times, leaving a remainder of 68.
The next digit of our result is 3. 
Result so far: 110373.0
If we take 270 away from 338, we end up with 68.
Bring next digit (6) of the dividend behind the 68 and repeat the process: 686 / 90

Let's proceed to step 8:
When dividing 686 by 90, we get 7 with a remainder of 56.
Write down 7 as next digit of the result. 
Result so far: 1103737.0
If we take 630 away from 686, we end up with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 9:
If we divide 560 by 90, we get 6 and a remainder of 20.
Put 6 as the next digit of the answer. 
Result so far: 1103737.6
If we take 540 away from 560, 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.

On to step 10:
If we divide 200 by 90, we get 2 and a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 1103737.62
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.

Step 11:
90 goes into 200 2 times with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 1103737.622
Subtract 180 from 200 to 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.

Our division results in 1103737.622 with a remaining 0.002.