We look at the division of 285664 by 72 
The aim is to understand the frequency of 72 in 285664.

On to step 1:
72 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 72

On to step 2:
When dividing 28 by 72, we get 0 with a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 28 leaves us with 28.
Fetch the next digit (5) from the dividend, attach it to 28 and continue: 285 / 72

Let's proceed to step 3:
If we divide 285 by 72, we get 3 and a remainder of 69.
Write down 3 as next digit of the result. 
Result so far: 3.0
If we subtract 216 from 285, we get 69.
Fetch the next digit (6) from the dividend, attach it to 69 and continue: 696 / 72

Step 4:
72 goes into 696 9 times with a remainder of 48.
Use 9 as the next digit of our solution. 
Result so far: 39.0
If we subtract 648 from 696, we get 48.
Bring next digit (6) of the dividend behind the 48 and repeat the process: 486 / 72

On to step 5:
72 can be fit into 486 6 times, resulting in a remainder of 54.
Write down 6 as next digit of the result. 
Result so far: 396.0
Subtracting 432 from 486 leaves us with 54.
Grab the next digit (4) from the dividend, add it to 54, then carry on: 544 / 72

Advancing to step 6:
When dividing 544 by 72, we get 7 with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 3967.0
Subtract 504 from 544 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 7:
72 can be fit into 400 5 times, resulting in a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 3967.5
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 8:
The number 72 fits into 400 5 times, leaving a remainder of 40.
Put 5 as the next digit of the answer. 
Result so far: 3967.55
Subtract 360 from 400 to get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Our division results in 3967.55 with a remaining 0.04.