We look at the division of 21079952 by 723 
The aim is to understand the frequency of 723 in 21079952.

Step 1:
The number 723 fits into 2 0 times, leaving a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 723

Advancing to step 2:
The number 723 fits into 21 0 times, leaving a remainder of 21.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 21, we end up with 21.
Grab the next digit (0) from the dividend, add it to 21, then carry on: 210 / 723

Advancing to step 3:
723 goes into 210 0 times with a remainder of 210.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 210, we get 210.
Include the next digit (7) from the dividend after 210, then repeat: 2107 / 723

Moving on to step 4:
723 can be fit into 2107 2 times, resulting in a remainder of 661.
The next digit of our result is 2. 
Result so far: 2.0
Subtract 1446 from 2107 to get 661.
Grab the next digit (9) from the dividend, add it to 661, then carry on: 6619 / 723

Going ahead to step 5:
If we divide 6619 by 723, we get 9 and a remainder of 112.
Put 9 as the next digit of the answer. 
Result so far: 29.0
Subtract 6507 from 6619 to get 112.
Fetch the next digit (9) from the dividend, attach it to 112 and continue: 1129 / 723

Step 6:
If we divide 1129 by 723, we get 1 and a remainder of 406.
Use 1 as the next digit of our solution. 
Result so far: 291.0
The remainder is 406 after subtracting 723 from 1129.
Fetch the next digit (5) from the dividend, attach it to 406 and continue: 4065 / 723

Advancing to step 7:
723 can be fit into 4065 5 times, resulting in a remainder of 450.
Put 5 as the next digit of the answer. 
Result so far: 2915.0
Deduct 3615 from 4065 and we're left with 450.
Grab the next digit (2) from the dividend, add it to 450, then carry on: 4502 / 723

Step 8:
723 can be fit into 4502 6 times, resulting in a remainder of 164.
Record the quotient 6 as the next digit in the result. 
Result so far: 29156.0
Subtract 4338 from 4502 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Moving on to step 9:
The number 723 fits into 1640 2 times, leaving a remainder of 194.
Record the quotient 2 as the next digit in the result. 
Result so far: 29156.2
Deduct 1446 from 1640 and we're left with 194.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Advancing to step 10:
When dividing 1940 by 723, we get 2 with a remainder of 494.
Record the quotient 2 as the next digit in the result. 
Result so far: 29156.22
If we subtract 1446 from 1940, we get 494.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4940, and continue the process.

The quotient of the division is 29156.22, and the remainder is 0.494.