919625 ÷ 21 
The aim is to understand the frequency of 21 in 919625.

Advancing to step 1:
21 goes into 9 0 times with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Fetch the next digit (1) from the dividend, attach it to 9 and continue: 91 / 21

Advancing to step 2:
The number 21 fits into 91 4 times, leaving a remainder of 7.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 84 from 91 to get 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 21

Going ahead to step 3:
21 goes into 79 3 times with a remainder of 16.
The number 3 becomes the next digit in our result. 
Result so far: 43.0
If we subtract 63 from 79, we get 16.
Append the next digit (6) from the dividend to 16 and continue with: 166 / 21

Step 4:
When dividing 166 by 21, we get 7 with a remainder of 19.
Put 7 as the next digit of the answer. 
Result so far: 437.0
If we subtract 147 from 166, we get 19.
Grab the next digit (2) from the dividend, add it to 19, then carry on: 192 / 21

Step 5:
The number 21 fits into 192 9 times, leaving a remainder of 3.
Write down 9 as next digit of the result. 
Result so far: 4379.0
If we subtract 189 from 192, we get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 21

On to step 6:
When dividing 35 by 21, we get 1 with a remainder of 14.
The next digit of our result is 1. 
Result so far: 43791.0
The remainder is 14 after subtracting 21 from 35.
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 7:
21 goes into 140 6 times with a remainder of 14.
Use 6 as the next digit of our solution. 
Result so far: 43791.6
If we subtract 126 from 140, we 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 8:
When dividing 140 by 21, we get 6 with a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 43791.66
Deduct 126 from 140 and we're left 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.

In conclusion, the division gives 43791.66 with a balance of 0.014.