90722585 ÷ 869 
The aim is to understand the frequency of 869 in 90722585.

On to step 1:
869 goes into 9 0 times with a remainder of 9.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 869

Going ahead to step 2:
869 goes into 90 0 times with a remainder of 90.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 90 to get 90.
Fetch the next digit (7) from the dividend, attach it to 90 and continue: 907 / 869

Step 3:
869 can be fit into 907 1 times, resulting in a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 869 from 907 to get 38.
Append the next digit (2) from the dividend to 38 and continue with: 382 / 869

Advancing to step 4:
869 can be fit into 382 0 times, resulting in a remainder of 382.
Put 0 as the next digit of the answer. 
Result so far: 10.0
Subtracting 0 from 382 leaves us with 382.
Include the next digit (2) from the dividend after 382, then repeat: 3822 / 869

Advancing to step 5:
If we divide 3822 by 869, we get 4 and a remainder of 346.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
Subtracting 3476 from 3822 leaves us with 346.
Include the next digit (5) from the dividend after 346, then repeat: 3465 / 869

Advancing to step 6:
When dividing 3465 by 869, we get 3 with a remainder of 858.
Record the quotient 3 as the next digit in the result. 
Result so far: 1043.0
Subtract 2607 from 3465 to get 858.
Take the next digit (8) from the dividend and append it to 858, then repeat: 8588 / 869

Step 7:
If we divide 8588 by 869, we get 9 and a remainder of 767.
The number 9 becomes the next digit in our result. 
Result so far: 10439.0
Subtracting 7821 from 8588 leaves us with 767.
Fetch the next digit (5) from the dividend, attach it to 767 and continue: 7675 / 869

Going ahead to step 8:
869 can be fit into 7675 8 times, resulting in a remainder of 723.
The next digit of our result is 8. 
Result so far: 104398.0
If we subtract 6952 from 7675, we get 723.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7230, and continue the process.

Advancing to step 9:
When dividing 7230 by 869, we get 8 with a remainder of 278.
Put 8 as the next digit of the answer. 
Result so far: 104398.8
Subtracting 6952 from 7230 leaves us with 278.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

Let's proceed to step 10:
869 goes into 2780 3 times with a remainder of 173.
The next digit of our result is 3. 
Result so far: 104398.83
If we take 2607 away from 2780, we end up with 173.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1730, and continue the process.

On to step 11:
The number 869 fits into 1730 1 times, leaving a remainder of 861.
Write down 1 as next digit of the result. 
Result so far: 104398.831
If we take 869 away from 1730, we end up with 861.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8610, and continue the process.

Going ahead to step 12:
8610 divided by 869 is 9 with a remainder of 789.
Write down 9 as next digit of the result. 
Result so far: 104398.8319
If we subtract 7821 from 8610, we get 789.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7890, and continue the process.

Moving on to step 13:
869 goes into 7890 9 times with a remainder of 69.
The next digit of our result is 9. 
Result so far: 104398.83199
Subtracting 7821 from 7890 leaves us with 69.
Since there are no more digits in the dividend, we add a zero to the remainder making it 690, and continue the process.

The final outcome is 104398.83199, with a leftover of 6.9e-05.