87594623 ÷ 9 
The aim is to understand the frequency of 9 in 87594623.

Let's proceed to step 1:
The number 9 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 9

Advancing to step 2:
The number 9 fits into 87 9 times, leaving a remainder of 6.
Write down 9 as next digit of the result. 
Result so far: 9.0
Subtract 81 from 87 to get 6.
Include the next digit (5) from the dividend after 6, then repeat: 65 / 9

Step 3:
65 divided by 9 is 7 with a remainder of 2.
The next digit of our result is 7. 
Result so far: 97.0
Subtract 63 from 65 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 9

Moving on to step 4:
9 goes into 29 3 times with a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 973.0
Subtract 27 from 29 to get 2.
Append the next digit (4) from the dividend to 2 and continue with: 24 / 9

Step 5:
When dividing 24 by 9, we get 2 with a remainder of 6.
Use 2 as the next digit of our solution. 
Result so far: 9732.0
If we subtract 18 from 24, we get 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 9

On to step 6:
The number 9 fits into 66 7 times, leaving a remainder of 3.
The next digit of our result is 7. 
Result so far: 97327.0
The remainder is 3 after subtracting 63 from 66.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 9

Going ahead to step 7:
When dividing 32 by 9, we get 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 973273.0
Subtracting 27 from 32 leaves us with 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 9

Let's proceed to step 8:
9 goes into 53 5 times with a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 9732735.0
Subtracting 45 from 53 leaves us with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 9:
80 divided by 9 is 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 9732735.8
Subtract 72 from 80 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
When dividing 80 by 9, we get 8 with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 9732735.88
If we take 72 away from 80, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 9732735.88 and a remainder of 0.008.