We're dividing 21912197 by 921 
The aim is to understand the frequency of 921 in 21912197.

On to step 1:
When dividing 2 by 921, we get 0 with a remainder of 2.
The next digit of our result is 0. 
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 / 921

On to step 2:
If we divide 21 by 921, 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.
Include the next digit (9) from the dividend after 21, then repeat: 219 / 921

Step 3:
921 goes into 219 0 times with a remainder of 219.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 219, we end up with 219.
Take the next digit (1) from the dividend and append it to 219, then repeat: 2191 / 921

Moving on to step 4:
921 goes into 2191 2 times with a remainder of 349.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
The remainder is 349 after subtracting 1842 from 2191.
Bring next digit (2) of the dividend behind the 349 and repeat the process: 3492 / 921

Let's proceed to step 5:
3492 divided by 921 is 3 with a remainder of 729.
Write down 3 as next digit of the result. 
Result so far: 23.0
Deduct 2763 from 3492 and we're left with 729.
Bring next digit (1) of the dividend behind the 729 and repeat the process: 7291 / 921

Moving on to step 6:
7291 divided by 921 is 7 with a remainder of 844.
Record the quotient 7 as the next digit in the result. 
Result so far: 237.0
Deduct 6447 from 7291 and we're left with 844.
Fetch the next digit (9) from the dividend, attach it to 844 and continue: 8449 / 921

On to step 7:
The number 921 fits into 8449 9 times, leaving a remainder of 160.
The next digit of our result is 9. 
Result so far: 2379.0
If we take 8289 away from 8449, we end up with 160.
Bring next digit (7) of the dividend behind the 160 and repeat the process: 1607 / 921

On to step 8:
When dividing 1607 by 921, we get 1 with a remainder of 686.
Put 1 as the next digit of the answer. 
Result so far: 23791.0
Deduct 921 from 1607 and we're left with 686.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6860, and continue the process.

Going ahead to step 9:
921 can be fit into 6860 7 times, resulting in a remainder of 413.
The next digit of our result is 7. 
Result so far: 23791.7
Deduct 6447 from 6860 and we're left with 413.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4130, and continue the process.

Advancing to step 10:
If we divide 4130 by 921, we get 4 and a remainder of 446.
The next digit of our result is 4. 
Result so far: 23791.74
Subtract 3684 from 4130 to get 446.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4460, and continue the process.

Let's proceed to step 11:
921 goes into 4460 4 times with a remainder of 776.
Write down 4 as next digit of the result. 
Result so far: 23791.744
The remainder is 776 after subtracting 3684 from 4460.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7760, and continue the process.

The final outcome is 23791.744, with a leftover of 0.0776.