We divide 679202 by 90
The aim is to understand the frequency of 90 in 679202.

Going ahead to step 1:
If we divide 6 by 90, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 90

On to step 2:
The number 90 fits into 67 0 times, leaving a remainder of 67.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 67 leaves us with 67.
Bring next digit (9) of the dividend behind the 67 and repeat the process: 679 / 90

On to step 3:
The number 90 fits into 679 7 times, leaving a remainder of 49.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
If we take 630 away from 679, we end up with 49.
Bring next digit (2) of the dividend behind the 49 and repeat the process: 492 / 90

Going ahead to step 4:
90 can be fit into 492 5 times, resulting in a remainder of 42.
Write down 5 as next digit of the result. 
Result so far: 75.0
Subtracting 450 from 492 leaves us with 42.
Bring next digit (0) of the dividend behind the 42 and repeat the process: 420 / 90

Advancing to step 5:
If we divide 420 by 90, we get 4 and a remainder of 60.
Write down 4 as next digit of the result. 
Result so far: 754.0
Deduct 360 from 420 and we're left with 60.
Bring next digit (2) of the dividend behind the 60 and repeat the process: 602 / 90

On to step 6:
The number 90 fits into 602 6 times, leaving a remainder of 62.
Record the quotient 6 as the next digit in the result. 
Result so far: 7546.0
If we subtract 540 from 602, we get 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Going ahead to step 7:
The number 90 fits into 620 6 times, leaving a remainder of 80.
Record the quotient 6 as the next digit in the result. 
Result so far: 7546.6
If we take 540 away from 620, we end up with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Step 8:
The number 90 fits into 800 8 times, leaving a remainder of 80.
Use 8 as the next digit of our solution. 
Result so far: 7546.68
If we subtract 720 from 800, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Moving on to step 9:
90 goes into 800 8 times with a remainder of 80.
Put 8 as the next digit of the answer. 
Result so far: 7546.688
Deduct 720 from 800 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The quotient of the division is 7546.688, and the remainder is 0.008.