888017 ÷ 90 
The aim is to understand the frequency of 90 in 888017.

Going ahead to step 1:
When dividing 8 by 90, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 90

Let's proceed to step 2:
The number 90 fits into 88 0 times, leaving a remainder of 88.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 88, we get 88.
Append the next digit (8) from the dividend to 88 and continue with: 888 / 90

Moving on to step 3:
90 goes into 888 9 times with a remainder of 78.
The next digit of our result is 9. 
Result so far: 9.0
The remainder is 78 after subtracting 810 from 888.
Bring next digit (0) of the dividend behind the 78 and repeat the process: 780 / 90

Advancing to step 4:
The number 90 fits into 780 8 times, leaving a remainder of 60.
Write down 8 as next digit of the result. 
Result so far: 98.0
If we subtract 720 from 780, we get 60.
Grab the next digit (1) from the dividend, add it to 60, then carry on: 601 / 90

Let's proceed to step 5:
When dividing 601 by 90, we get 6 with a remainder of 61.
Use 6 as the next digit of our solution. 
Result so far: 986.0
If we take 540 away from 601, we end up with 61.
Append the next digit (7) from the dividend to 61 and continue with: 617 / 90

Let's proceed to step 6:
If we divide 617 by 90, we get 6 and a remainder of 77.
The next digit of our result is 6. 
Result so far: 9866.0
If we subtract 540 from 617, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 7:
770 divided by 90 is 8 with a remainder of 50.
Use 8 as the next digit of our solution. 
Result so far: 9866.8
If we take 720 away from 770, we end up 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.

Advancing to step 8:
500 divided by 90 is 5 with a remainder of 50.
The next digit of our result is 5. 
Result so far: 9866.85
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.

Step 9:
If we divide 500 by 90, we get 5 and a remainder of 50.
The next digit of our result is 5. 
Result so far: 9866.855
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.

The final outcome is 9866.855, with a leftover of 0.005.