We're dividing 21733564 by 991 
The aim is to understand the frequency of 991 in 21733564.

Let's proceed to step 1:
If we divide 2 by 991, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 991

Going ahead to step 2:
If we divide 21 by 991, we get 0 and a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 21 leaves us with 21.
Append the next digit (7) from the dividend to 21 and continue with: 217 / 991

Advancing to step 3:
When dividing 217 by 991, we get 0 with a remainder of 217.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 217 to get 217.
Append the next digit (3) from the dividend to 217 and continue with: 2173 / 991

Moving on to step 4:
991 goes into 2173 2 times with a remainder of 191.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 1982 from 2173 leaves us with 191.
Grab the next digit (3) from the dividend, add it to 191, then carry on: 1913 / 991

Step 5:
If we divide 1913 by 991, we get 1 and a remainder of 922.
Write down 1 as next digit of the result. 
Result so far: 21.0
The remainder is 922 after subtracting 991 from 1913.
Fetch the next digit (5) from the dividend, attach it to 922 and continue: 9225 / 991

Let's proceed to step 6:
When dividing 9225 by 991, we get 9 with a remainder of 306.
Put 9 as the next digit of the answer. 
Result so far: 219.0
Deduct 8919 from 9225 and we're left with 306.
Take the next digit (6) from the dividend and append it to 306, then repeat: 3066 / 991

Moving on to step 7:
3066 divided by 991 is 3 with a remainder of 93.
The number 3 becomes the next digit in our result. 
Result so far: 2193.0
If we take 2973 away from 3066, we end up with 93.
Include the next digit (4) from the dividend after 93, then repeat: 934 / 991

Moving on to step 8:
The number 991 fits into 934 0 times, leaving a remainder of 934.
The next digit of our result is 0. 
Result so far: 21930.0
Subtracting 0 from 934 leaves us with 934.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9340, and continue the process.

On to step 9:
If we divide 9340 by 991, we get 9 and a remainder of 421.
The number 9 becomes the next digit in our result. 
Result so far: 21930.9
If we subtract 8919 from 9340, we get 421.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4210, and continue the process.

Step 10:
4210 divided by 991 is 4 with a remainder of 246.
The number 4 becomes the next digit in our result. 
Result so far: 21930.94
Deduct 3964 from 4210 and we're left with 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Advancing to step 11:
When dividing 2460 by 991, we get 2 with a remainder of 478.
The next digit of our result is 2. 
Result so far: 21930.942
Deduct 1982 from 2460 and we're left with 478.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4780, and continue the process.

On to step 12:
If we divide 4780 by 991, we get 4 and a remainder of 816.
The next digit of our result is 4. 
Result so far: 21930.9424
Subtract 3964 from 4780 to get 816.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8160, and continue the process.

Going ahead to step 13:
991 can be fit into 8160 8 times, resulting in a remainder of 232.
The number 8 becomes the next digit in our result. 
Result so far: 21930.94248
The remainder is 232 after subtracting 7928 from 8160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2320, and continue the process.

Advancing to step 14:
991 can be fit into 2320 2 times, resulting in a remainder of 338.
Put 2 as the next digit of the answer. 
Result so far: 21930.942482
Subtracting 1982 from 2320 leaves us with 338.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3380, and continue the process.

Let's proceed to step 15:
991 goes into 3380 3 times with a remainder of 407.
Write down 3 as next digit of the result. 
Result so far: 21930.9424823
The remainder is 407 after subtracting 2973 from 3380.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4070, and continue the process.

Moving on to step 16:
When dividing 4070 by 991, we get 4 with a remainder of 106.
Record the quotient 4 as the next digit in the result. 
Result so far: 21930.94248234
If we subtract 3964 from 4070, we get 106.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1060, and continue the process.

After the division, we end up with 21930.94248234 and a remainder of 1.06e-07.