Let's divide 26141921 by 421
The aim is to understand the frequency of 421 in 26141921.

Going ahead to step 1:
421 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Take the next digit (6) from the dividend and append it to 2, then repeat: 26 / 421

Moving on to step 2:
The number 421 fits into 26 0 times, leaving a remainder of 26.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 26 leaves us with 26.
Append the next digit (1) from the dividend to 26 and continue with: 261 / 421

Step 3:
The number 421 fits into 261 0 times, leaving a remainder of 261.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 261, we end up with 261.
Bring next digit (4) of the dividend behind the 261 and repeat the process: 2614 / 421

Advancing to step 4:
2614 divided by 421 is 6 with a remainder of 88.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 2526 from 2614 and we're left with 88.
Grab the next digit (1) from the dividend, add it to 88, then carry on: 881 / 421

Let's proceed to step 5:
421 can be fit into 881 2 times, resulting in a remainder of 39.
The number 2 becomes the next digit in our result. 
Result so far: 62.0
Deduct 842 from 881 and we're left with 39.
Append the next digit (9) from the dividend to 39 and continue with: 399 / 421

On to step 6:
421 can be fit into 399 0 times, resulting in a remainder of 399.
The next digit of our result is 0. 
Result so far: 620.0
If we take 0 away from 399, we end up with 399.
Grab the next digit (2) from the dividend, add it to 399, then carry on: 3992 / 421

Advancing to step 7:
If we divide 3992 by 421, we get 9 and a remainder of 203.
Record the quotient 9 as the next digit in the result. 
Result so far: 6209.0
Subtract 3789 from 3992 to get 203.
Include the next digit (1) from the dividend after 203, then repeat: 2031 / 421

Step 8:
When dividing 2031 by 421, we get 4 with a remainder of 347.
The number 4 becomes the next digit in our result. 
Result so far: 62094.0
If we subtract 1684 from 2031, we get 347.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3470, and continue the process.

Going ahead to step 9:
421 goes into 3470 8 times with a remainder of 102.
Record the quotient 8 as the next digit in the result. 
Result so far: 62094.8
If we take 3368 away from 3470, we end up with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 10:
When dividing 1020 by 421, we get 2 with a remainder of 178.
The next digit of our result is 2. 
Result so far: 62094.82
Deduct 842 from 1020 and we're left with 178.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1780, and continue the process.

On to step 11:
The number 421 fits into 1780 4 times, leaving a remainder of 96.
The next digit of our result is 4. 
Result so far: 62094.824
Subtracting 1684 from 1780 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Let's proceed to step 12:
If we divide 960 by 421, we get 2 and a remainder of 118.
Put 2 as the next digit of the answer. 
Result so far: 62094.8242
Subtract 842 from 960 to get 118.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1180, and continue the process.

Step 13:
1180 divided by 421 is 2 with a remainder of 338.
Write down 2 as next digit of the result. 
Result so far: 62094.82422
If we take 842 away from 1180, we end up 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.

Our division results in 62094.82422 with a remaining 0.000338.