21306315 divided by 722 
The aim is to understand the frequency of 722 in 21306315.

Advancing to step 1:
When dividing 2 by 722, we get 0 with a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 722

Step 2:
The number 722 fits into 21 0 times, leaving a remainder of 21.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Grab the next digit (3) from the dividend, add it to 21, then carry on: 213 / 722

Step 3:
If we divide 213 by 722, we get 0 and a remainder of 213.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 213 after subtracting 0 from 213.
Bring next digit (0) of the dividend behind the 213 and repeat the process: 2130 / 722

On to step 4:
If we divide 2130 by 722, we get 2 and a remainder of 686.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Deduct 1444 from 2130 and we're left with 686.
Grab the next digit (6) from the dividend, add it to 686, then carry on: 6866 / 722

Going ahead to step 5:
6866 divided by 722 is 9 with a remainder of 368.
Write down 9 as next digit of the result. 
Result so far: 29.0
The remainder is 368 after subtracting 6498 from 6866.
Grab the next digit (3) from the dividend, add it to 368, then carry on: 3683 / 722

On to step 6:
3683 divided by 722 is 5 with a remainder of 73.
The number 5 becomes the next digit in our result. 
Result so far: 295.0
Subtracting 3610 from 3683 leaves us with 73.
Take the next digit (1) from the dividend and append it to 73, then repeat: 731 / 722

Moving on to step 7:
722 can be fit into 731 1 times, resulting in a remainder of 9.
Record the quotient 1 as the next digit in the result. 
Result so far: 2951.0
Deduct 722 from 731 and we're left with 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 722

Going ahead to step 8:
722 goes into 95 0 times with a remainder of 95.
The number 0 becomes the next digit in our result. 
Result so far: 29510.0
Subtract 0 from 95 to get 95.
Since there are no more digits in the dividend, we add a zero to the remainder making it 950, and continue the process.

Moving on to step 9:
If we divide 950 by 722, we get 1 and a remainder of 228.
The next digit of our result is 1. 
Result so far: 29510.1
Deduct 722 from 950 and we're left with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

On to step 10:
The number 722 fits into 2280 3 times, leaving a remainder of 114.
Use 3 as the next digit of our solution. 
Result so far: 29510.13
If we subtract 2166 from 2280, we get 114.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1140, and continue the process.

Let's proceed to step 11:
722 goes into 1140 1 times with a remainder of 418.
The next digit of our result is 1. 
Result so far: 29510.131
The remainder is 418 after subtracting 722 from 1140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Going ahead to step 12:
If we divide 4180 by 722, we get 5 and a remainder of 570.
The next digit of our result is 5. 
Result so far: 29510.1315
Subtract 3610 from 4180 to get 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5700, and continue the process.

Going ahead to step 13:
722 goes into 5700 7 times with a remainder of 646.
The next digit of our result is 7. 
Result so far: 29510.13157
The remainder is 646 after subtracting 5054 from 5700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6460, and continue the process.

Going ahead to step 14:
When dividing 6460 by 722, we get 8 with a remainder of 684.
Record the quotient 8 as the next digit in the result. 
Result so far: 29510.131578
If we subtract 5776 from 6460, we get 684.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6840, and continue the process.

Moving on to step 15:
722 goes into 6840 9 times with a remainder of 342.
The next digit of our result is 9. 
Result so far: 29510.1315789
The remainder is 342 after subtracting 6498 from 6840.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Moving on to step 16:
722 goes into 3420 4 times with a remainder of 532.
Use 4 as the next digit of our solution. 
Result so far: 29510.13157894
If we take 2888 away from 3420, we end up with 532.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5320, and continue the process.

After the division, we end up with 29510.13157894 and a remainder of 5.32e-07.