Let's divide 487319 by 90
The aim is to understand the frequency of 90 in 487319.

Advancing to step 1:
90 can be fit into 4 0 times, resulting in a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 90

Advancing to step 2:
When dividing 48 by 90, we get 0 with a remainder of 48.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 48 leaves us with 48.
Grab the next digit (7) from the dividend, add it to 48, then carry on: 487 / 90

Moving on to step 3:
When dividing 487 by 90, we get 5 with a remainder of 37.
Put 5 as the next digit of the answer. 
Result so far: 5.0
Subtract 450 from 487 to get 37.
Take the next digit (3) from the dividend and append it to 37, then repeat: 373 / 90

Going ahead to step 4:
90 can be fit into 373 4 times, resulting in a remainder of 13.
Write down 4 as next digit of the result. 
Result so far: 54.0
The remainder is 13 after subtracting 360 from 373.
Take the next digit (1) from the dividend and append it to 13, then repeat: 131 / 90

Moving on to step 5:
90 goes into 131 1 times with a remainder of 41.
Use 1 as the next digit of our solution. 
Result so far: 541.0
Subtracting 90 from 131 leaves us with 41.
Include the next digit (9) from the dividend after 41, then repeat: 419 / 90

Step 6:
90 goes into 419 4 times with a remainder of 59.
Put 4 as the next digit of the answer. 
Result so far: 5414.0
If we take 360 away from 419, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Step 7:
If we divide 590 by 90, we get 6 and a remainder of 50.
Record the quotient 6 as the next digit in the result. 
Result so far: 5414.6
The remainder is 50 after subtracting 540 from 590.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Advancing to step 8:
If we divide 500 by 90, we get 5 and a remainder of 50.
Write down 5 as next digit of the result. 
Result so far: 5414.65
The remainder is 50 after subtracting 450 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 9:
90 goes into 500 5 times with a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 5414.655
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 5414.655 with a remaining 0.005.