468875 ÷ 21 
The aim is to understand the frequency of 21 in 468875.

Moving on to step 1:
21 can be fit into 4 0 times, resulting in a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Bring next digit (6) of the dividend behind the 4 and repeat the process: 46 / 21

Let's proceed to step 2:
46 divided by 21 is 2 with a remainder of 4.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 42 from 46 and we're left with 4.
Take the next digit (8) from the dividend and append it to 4, then repeat: 48 / 21

Moving on to step 3:
21 can be fit into 48 2 times, resulting in a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
If we subtract 42 from 48, we get 6.
Bring next digit (8) of the dividend behind the 6 and repeat the process: 68 / 21

Moving on to step 4:
If we divide 68 by 21, we get 3 and a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 223.0
If we take 63 away from 68, we end up with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 21

Let's proceed to step 5:
When dividing 57 by 21, we get 2 with a remainder of 15.
The next digit of our result is 2. 
Result so far: 2232.0
The remainder is 15 after subtracting 42 from 57.
Grab the next digit (5) from the dividend, add it to 15, then carry on: 155 / 21

Advancing to step 6:
The number 21 fits into 155 7 times, leaving a remainder of 8.
Write down 7 as next digit of the result. 
Result so far: 22327.0
Deduct 147 from 155 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

On to step 7:
80 divided by 21 is 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 22327.3
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Step 8:
21 goes into 170 8 times with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 22327.38
Subtracting 168 from 170 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 9:
21 can be fit into 20 0 times, resulting in a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 22327.38
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 10:
When dividing 200 by 21, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 22327.3809
Subtracting 189 from 200 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 11:
The number 21 fits into 110 5 times, leaving a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 22327.38095
Subtract 105 from 110 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 12:
If we divide 50 by 21, we get 2 and a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 22327.380952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 13:
21 goes into 80 3 times with a remainder of 17.
Put 3 as the next digit of the answer. 
Result so far: 22327.3809523
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 14:
21 can be fit into 170 8 times, resulting in a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 22327.38095238
Subtract 168 from 170 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The final result is 22327.38095238 with a remainder of 2e-09.