991618 ÷ 9 
The aim is to understand the frequency of 9 in 991618.

Advancing to step 1:
9 can be fit into 9 1 times, resulting in a remainder of 0.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 0 after subtracting 9 from 9.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 9

Let's proceed to step 2:
9 can be fit into 9 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 11.0
Subtracting 9 from 9 leaves us with 0.
Take the next digit (1) from the dividend and append it to 0, then repeat: 1 / 9

Advancing to step 3:
If we divide 1 by 9, we get 0 and a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 110.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 9

Advancing to step 4:
The number 9 fits into 16 1 times, leaving a remainder of 7.
The number 1 becomes the next digit in our result. 
Result so far: 1101.0
If we subtract 9 from 16, we get 7.
Grab the next digit (1) from the dividend, add it to 7, then carry on: 71 / 9

Let's proceed to step 5:
9 can be fit into 71 7 times, resulting in a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 11017.0
If we subtract 63 from 71, we get 8.
Grab the next digit (8) from the dividend, add it to 8, then carry on: 88 / 9

Going ahead to step 6:
9 goes into 88 9 times with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 110179.0
If we take 81 away from 88, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
When dividing 70 by 9, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 110179.7
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Let's proceed to step 8:
70 divided by 9 is 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 110179.77
If we take 63 away from 70, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

The final result is 110179.77 with a remainder of 0.007.