Let's divide 319636 by 90
The aim is to understand the frequency of 90 in 319636.

Let's proceed to step 1:
3 divided by 90 is 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 90

Going ahead to step 2:
When dividing 31 by 90, we get 0 with a remainder of 31.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 31 after subtracting 0 from 31.
Take the next digit (9) from the dividend and append it to 31, then repeat: 319 / 90

Going ahead to step 3:
90 goes into 319 3 times with a remainder of 49.
Use 3 as the next digit of our solution. 
Result so far: 3.0
The remainder is 49 after subtracting 270 from 319.
Bring next digit (6) of the dividend behind the 49 and repeat the process: 496 / 90

On to step 4:
90 can be fit into 496 5 times, resulting in a remainder of 46.
Use 5 as the next digit of our solution. 
Result so far: 35.0
The remainder is 46 after subtracting 450 from 496.
Include the next digit (3) from the dividend after 46, then repeat: 463 / 90

On to step 5:
463 divided by 90 is 5 with a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 355.0
If we take 450 away from 463, we end up with 13.
Bring next digit (6) of the dividend behind the 13 and repeat the process: 136 / 90

Let's proceed to step 6:
If we divide 136 by 90, we get 1 and a remainder of 46.
Record the quotient 1 as the next digit in the result. 
Result so far: 3551.0
If we take 90 away from 136, we end up with 46.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 7:
90 can be fit into 460 5 times, resulting in a remainder of 10.
The number 5 becomes the next digit in our result. 
Result so far: 3551.5
If we take 450 away from 460, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
The number 90 fits into 100 1 times, leaving a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 3551.51
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 9:
100 divided by 90 is 1 with a remainder of 10.
Use 1 as the next digit of our solution. 
Result so far: 3551.511
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 3551.511 and a remainder of 0.001.