We're dividing 547967 by 21 
The aim is to understand the frequency of 21 in 547967.

Step 1:
If we divide 5 by 21, we get 0 and a remainder of 5.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 21

Let's proceed to step 2:
54 divided by 21 is 2 with a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 42 away from 54, we end up with 12.
Bring next digit (7) of the dividend behind the 12 and repeat the process: 127 / 21

Advancing to step 3:
If we divide 127 by 21, we get 6 and a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
The remainder is 1 after subtracting 126 from 127.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 21

Advancing to step 4:
If we divide 19 by 21, we get 0 and a remainder of 19.
Write down 0 as next digit of the result. 
Result so far: 260.0
The remainder is 19 after subtracting 0 from 19.
Fetch the next digit (6) from the dividend, attach it to 19 and continue: 196 / 21

Let's proceed to step 5:
21 can be fit into 196 9 times, resulting in a remainder of 7.
The next digit of our result is 9. 
Result so far: 2609.0
If we take 189 away from 196, we end up with 7.
Fetch the next digit (7) from the dividend, attach it to 7 and continue: 77 / 21

Going ahead to step 6:
The number 21 fits into 77 3 times, leaving a remainder of 14.
The next digit of our result is 3. 
Result so far: 26093.0
If we take 63 away from 77, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 7:
If we divide 140 by 21, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 26093.6
Subtract 126 from 140 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.

On to step 8:
21 goes into 140 6 times with a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 26093.66
Subtract 126 from 140 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.

The final result is 26093.66 with a remainder of 0.014.