Let's divide 22421 by 91
The aim is to understand the frequency of 91 in 22421.

Step 1:
2 divided by 91 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Take the next digit (2) from the dividend and append it to 2, then repeat: 22 / 91

Going ahead to step 2:
The number 91 fits into 22 0 times, leaving a remainder of 22.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 22 and we're left with 22.
Grab the next digit (4) from the dividend, add it to 22, then carry on: 224 / 91

Moving on to step 3:
When dividing 224 by 91, we get 2 with a remainder of 42.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 182 from 224 and we're left with 42.
Grab the next digit (2) from the dividend, add it to 42, then carry on: 422 / 91

On to step 4:
91 goes into 422 4 times with a remainder of 58.
Record the quotient 4 as the next digit in the result. 
Result so far: 24.0
Subtract 364 from 422 to get 58.
Fetch the next digit (1) from the dividend, attach it to 58 and continue: 581 / 91

Moving on to step 5:
If we divide 581 by 91, we get 6 and a remainder of 35.
The number 6 becomes the next digit in our result. 
Result so far: 246.0
Subtracting 546 from 581 leaves us with 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 6:
91 can be fit into 350 3 times, resulting in a remainder of 77.
The next digit of our result is 3. 
Result so far: 246.3
Subtracting 273 from 350 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Going ahead to step 7:
The number 91 fits into 770 8 times, leaving a remainder of 42.
Use 8 as the next digit of our solution. 
Result so far: 246.38
Subtract 728 from 770 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

On to step 8:
420 divided by 91 is 4 with a remainder of 56.
The number 4 becomes the next digit in our result. 
Result so far: 246.384
Subtracting 364 from 420 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Moving on to step 9:
91 goes into 560 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 246.3846
Subtract 546 from 560 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 10:
91 can be fit into 140 1 times, resulting in a remainder of 49.
Use 1 as the next digit of our solution. 
Result so far: 246.38461
Subtract 91 from 140 to get 49.
Since there are no more digits in the dividend, we add a zero to the remainder making it 490, and continue the process.

Moving on to step 11:
91 goes into 490 5 times with a remainder of 35.
Record the quotient 5 as the next digit in the result. 
Result so far: 246.384615
The remainder is 35 after subtracting 455 from 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Step 12:
91 goes into 350 3 times with a remainder of 77.
Use 3 as the next digit of our solution. 
Result so far: 246.3846153
Subtracting 273 from 350 leaves us with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 13:
When dividing 770 by 91, we get 8 with a remainder of 42.
The next digit of our result is 8. 
Result so far: 246.38461538
If we take 728 away from 770, we end up with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The final result is 246.38461538 with a remainder of 4.2e-08.