We look at the division of 722878 by 72 
The aim is to understand the frequency of 72 in 722878.

Moving on to step 1:
7 divided by 72 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 72

On to step 2:
If we divide 72 by 72, we get 1 and a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 72 from 72, we get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 72

Advancing to step 3:
72 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtract 0 from 2 to get 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 72

Advancing to step 4:
28 divided by 72 is 0 with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 100.0
If we subtract 0 from 28, we get 28.
Include the next digit (7) from the dividend after 28, then repeat: 287 / 72

Step 5:
If we divide 287 by 72, we get 3 and a remainder of 71.
The number 3 becomes the next digit in our result. 
Result so far: 1003.0
If we take 216 away from 287, we end up with 71.
Include the next digit (8) from the dividend after 71, then repeat: 718 / 72

Going ahead to step 6:
718 divided by 72 is 9 with a remainder of 70.
Put 9 as the next digit of the answer. 
Result so far: 10039.0
If we subtract 648 from 718, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

On to step 7:
72 can be fit into 700 9 times, resulting in a remainder of 52.
Write down 9 as next digit of the result. 
Result so far: 10039.9
The remainder is 52 after subtracting 648 from 700.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Advancing to step 8:
72 goes into 520 7 times with a remainder of 16.
Use 7 as the next digit of our solution. 
Result so far: 10039.97
If we take 504 away from 520, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
72 can be fit into 160 2 times, resulting in a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 10039.972
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 10:
72 can be fit into 160 2 times, resulting in a remainder of 16.
Put 2 as the next digit of the answer. 
Result so far: 10039.9722
Subtract 144 from 160 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 10039.9722, and the remainder is 0.00016.