Let's divide 18469495 by 991
The aim is to understand the frequency of 991 in 18469495.

On to step 1:
991 can be fit into 1 0 times, resulting in a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 991

Going ahead to step 2:
The number 991 fits into 18 0 times, leaving a remainder of 18.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 18, we get 18.
Take the next digit (4) from the dividend and append it to 18, then repeat: 184 / 991

Moving on to step 3:
The number 991 fits into 184 0 times, leaving a remainder of 184.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 184, we get 184.
Take the next digit (6) from the dividend and append it to 184, then repeat: 1846 / 991

Advancing to step 4:
991 goes into 1846 1 times with a remainder of 855.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtracting 991 from 1846 leaves us with 855.
Include the next digit (9) from the dividend after 855, then repeat: 8559 / 991

Let's proceed to step 5:
If we divide 8559 by 991, we get 8 and a remainder of 631.
The next digit of our result is 8. 
Result so far: 18.0
The remainder is 631 after subtracting 7928 from 8559.
Append the next digit (4) from the dividend to 631 and continue with: 6314 / 991

Going ahead to step 6:
991 goes into 6314 6 times with a remainder of 368.
Put 6 as the next digit of the answer. 
Result so far: 186.0
Deduct 5946 from 6314 and we're left with 368.
Fetch the next digit (9) from the dividend, attach it to 368 and continue: 3689 / 991

Step 7:
991 can be fit into 3689 3 times, resulting in a remainder of 716.
Record the quotient 3 as the next digit in the result. 
Result so far: 1863.0
If we take 2973 away from 3689, we end up with 716.
Grab the next digit (5) from the dividend, add it to 716, then carry on: 7165 / 991

Step 8:
991 can be fit into 7165 7 times, resulting in a remainder of 228.
The next digit of our result is 7. 
Result so far: 18637.0
Subtracting 6937 from 7165 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Moving on to step 9:
991 can be fit into 2280 2 times, resulting in a remainder of 298.
Record the quotient 2 as the next digit in the result. 
Result so far: 18637.2
The remainder is 298 after subtracting 1982 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2980, and continue the process.

Moving on to step 10:
If we divide 2980 by 991, we get 3 and a remainder of 7.
Write down 3 as next digit of the result. 
Result so far: 18637.23
The remainder is 7 after subtracting 2973 from 2980.
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 11:
70 divided by 991 is 0 with a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 18637.23
Deduct 0 from 70 and we're left with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 12:
When dividing 700 by 991, we get 0 with a remainder of 700.
The number 0 becomes the next digit in our result. 
Result so far: 18637.23
The remainder is 700 after subtracting 0 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7000, and continue the process.

The final outcome is 18637.23, with a leftover of 0.007.