579221 ÷ 72 
The aim is to understand the frequency of 72 in 579221.

On to step 1:
The number 72 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 72

Moving on to step 2:
57 divided by 72 is 0 with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 57 after subtracting 0 from 57.
Include the next digit (9) from the dividend after 57, then repeat: 579 / 72

Going ahead to step 3:
The number 72 fits into 579 8 times, leaving a remainder of 3.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we take 576 away from 579, we end up with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 72

Advancing to step 4:
72 goes into 32 0 times with a remainder of 32.
The number 0 becomes the next digit in our result. 
Result so far: 80.0
If we subtract 0 from 32, we get 32.
Grab the next digit (2) from the dividend, add it to 32, then carry on: 322 / 72

Moving on to step 5:
322 divided by 72 is 4 with a remainder of 34.
Use 4 as the next digit of our solution. 
Result so far: 804.0
If we subtract 288 from 322, we get 34.
Append the next digit (1) from the dividend to 34 and continue with: 341 / 72

On to step 6:
72 can be fit into 341 4 times, resulting in a remainder of 53.
The number 4 becomes the next digit in our result. 
Result so far: 8044.0
If we subtract 288 from 341, we get 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Let's proceed to step 7:
When dividing 530 by 72, we get 7 with a remainder of 26.
Record the quotient 7 as the next digit in the result. 
Result so far: 8044.7
Subtracting 504 from 530 leaves us with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Let's proceed to step 8:
72 can be fit into 260 3 times, resulting in a remainder of 44.
Use 3 as the next digit of our solution. 
Result so far: 8044.73
Subtracting 216 from 260 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
When dividing 440 by 72, we get 6 with a remainder of 8.
The number 6 becomes the next digit in our result. 
Result so far: 8044.736
If we take 432 away from 440, we end up 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.

Let's proceed to step 10:
80 divided by 72 is 1 with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 8044.7361
Subtracting 72 from 80 leaves us 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.

Let's proceed to step 11:
72 goes into 80 1 times with a remainder of 8.
Record the quotient 1 as the next digit in the result. 
Result so far: 8044.73611
Deduct 72 from 80 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.

After the division, we end up with 8044.73611 and a remainder of 8e-06.