We're dividing 464699 by 21 
The aim is to understand the frequency of 21 in 464699.

Step 1:
If we divide 4 by 21, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Grab the next digit (6) from the dividend, add it to 4, then carry on: 46 / 21

Advancing to step 2:
When dividing 46 by 21, we get 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.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 21

Advancing to step 3:
If we divide 44 by 21, we get 2 and a remainder of 2.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
If we subtract 42 from 44, we get 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 21

On to step 4:
21 goes into 26 1 times with a remainder of 5.
Record the quotient 1 as the next digit in the result. 
Result so far: 221.0
Subtract 21 from 26 to get 5.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 21

Going ahead to step 5:
21 can be fit into 59 2 times, resulting in a remainder of 17.
Use 2 as the next digit of our solution. 
Result so far: 2212.0
The remainder is 17 after subtracting 42 from 59.
Include the next digit (9) from the dividend after 17, then repeat: 179 / 21

Let's proceed to step 6:
The number 21 fits into 179 8 times, leaving a remainder of 11.
Put 8 as the next digit of the answer. 
Result so far: 22128.0
Deduct 168 from 179 and we're left 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.

Let's proceed to step 7:
21 goes into 110 5 times with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 22128.5
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.

On to step 8:
If we divide 50 by 21, we get 2 and a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 22128.52
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.

Let's proceed to step 9:
When dividing 80 by 21, we get 3 with a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 22128.523
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.

On to step 10:
If we divide 170 by 21, we get 8 and a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 22128.5238
If we subtract 168 from 170, we 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.

Moving on to step 11:
21 goes into 20 0 times with a remainder of 20.
The next digit of our result is 0. 
Result so far: 22128.5238
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 12:
When dividing 200 by 21, we get 9 with a remainder of 11.
The next digit of our result is 9. 
Result so far: 22128.523809
If we take 189 away from 200, we end up 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.

Let's proceed to step 13:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 22128.5238095
Subtracting 105 from 110 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 14:
When dividing 50 by 21, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 22128.52380952
Deduct 42 from 50 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.

Our division results in 22128.52380952 with a remaining 8e-09.