We look at the division of 780105 by 90 
The aim is to understand the frequency of 90 in 780105.

Moving on to step 1:
90 goes into 7 0 times with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Append the next digit (8) from the dividend to 7 and continue with: 78 / 90

Advancing to step 2:
If we divide 78 by 90, we get 0 and a remainder of 78.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 78, we get 78.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 90

Advancing to step 3:
If we divide 780 by 90, we get 8 and a remainder of 60.
The next digit of our result is 8. 
Result so far: 8.0
Deduct 720 from 780 and we're left with 60.
Include the next digit (1) from the dividend after 60, then repeat: 601 / 90

Advancing to step 4:
601 divided by 90 is 6 with a remainder of 61.
Use 6 as the next digit of our solution. 
Result so far: 86.0
Deduct 540 from 601 and we're left with 61.
Take the next digit (0) from the dividend and append it to 61, then repeat: 610 / 90

Advancing to step 5:
90 can be fit into 610 6 times, resulting in a remainder of 70.
The next digit of our result is 6. 
Result so far: 866.0
The remainder is 70 after subtracting 540 from 610.
Grab the next digit (5) from the dividend, add it to 70, then carry on: 705 / 90

Step 6:
When dividing 705 by 90, we get 7 with a remainder of 75.
Write down 7 as next digit of the result. 
Result so far: 8667.0
Subtracting 630 from 705 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Step 7:
If we divide 750 by 90, we get 8 and a remainder of 30.
The number 8 becomes the next digit in our result. 
Result so far: 8667.8
Deduct 720 from 750 and we're left with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Step 8:
If we divide 300 by 90, we get 3 and a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 8667.83
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 9:
90 goes into 300 3 times with a remainder of 30.
The number 3 becomes the next digit in our result. 
Result so far: 8667.833
If we subtract 270 from 300, 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.

In conclusion, the division gives 8667.833 with a balance of 0.003.