Let's divide 470533 by 21
The aim is to understand the frequency of 21 in 470533.

Going ahead to step 1:
21 goes into 4 0 times with a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (7) from the dividend, add it to 4, then carry on: 47 / 21

Going ahead to step 2:
21 can be fit into 47 2 times, resulting in a remainder of 5.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we subtract 42 from 47, we get 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 21

Moving on to step 3:
When dividing 50 by 21, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 22.0
If we take 42 away from 50, we end up with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 21

Moving on to step 4:
85 divided by 21 is 4 with a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 224.0
If we take 84 away from 85, we end up with 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 21

Moving on to step 5:
21 can be fit into 13 0 times, resulting in a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 2240.0
If we subtract 0 from 13, we get 13.
Append the next digit (3) from the dividend to 13 and continue with: 133 / 21

Advancing to step 6:
When dividing 133 by 21, we get 6 with a remainder of 7.
The next digit of our result is 6. 
Result so far: 22406.0
Subtract 126 from 133 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Advancing to step 7:
If we divide 70 by 21, we get 3 and a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 22406.3
Subtract 63 from 70 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 8:
The number 21 fits into 70 3 times, leaving a remainder of 7.
Record the quotient 3 as the next digit in the result. 
Result so far: 22406.33
If we subtract 63 from 70, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Our division results in 22406.33 with a remaining 0.007.