85809 ÷ 88 
The aim is to understand the frequency of 88 in 85809.

On to step 1:
If we divide 8 by 88, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 88

Advancing to step 2:
85 divided by 88 is 0 with a remainder of 85.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 85 and we're left with 85.
Grab the next digit (8) from the dividend, add it to 85, then carry on: 858 / 88

Step 3:
88 can be fit into 858 9 times, resulting in a remainder of 66.
The next digit of our result is 9. 
Result so far: 9.0
Subtract 792 from 858 to get 66.
Include the next digit (0) from the dividend after 66, then repeat: 660 / 88

Let's proceed to step 4:
88 goes into 660 7 times with a remainder of 44.
Put 7 as the next digit of the answer. 
Result so far: 97.0
If we take 616 away from 660, we end up with 44.
Append the next digit (9) from the dividend to 44 and continue with: 449 / 88

Let's proceed to step 5:
449 divided by 88 is 5 with a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 975.0
Subtracting 440 from 449 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 6:
88 can be fit into 90 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 975.1
The remainder is 2 after subtracting 88 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
20 divided by 88 is 0 with a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 975.1
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
When dividing 200 by 88, we get 2 with a remainder of 24.
The next digit of our result is 2. 
Result so far: 975.102
If we subtract 176 from 200, we get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Advancing to step 9:
When dividing 240 by 88, we get 2 with a remainder of 64.
Put 2 as the next digit of the answer. 
Result so far: 975.1022
Deduct 176 from 240 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 975.1022, with a leftover of 0.00064.