We look at the division of 523640 by 72 
The aim is to understand the frequency of 72 in 523640.

Moving on to step 1:
The number 72 fits into 5 0 times, leaving a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (2) from the dividend to 5 and continue with: 52 / 72

Let's proceed to step 2:
72 goes into 52 0 times with a remainder of 52.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 52 leaves us with 52.
Append the next digit (3) from the dividend to 52 and continue with: 523 / 72

Going ahead to step 3:
The number 72 fits into 523 7 times, leaving a remainder of 19.
The next digit of our result is 7. 
Result so far: 7.0
If we take 504 away from 523, we end up with 19.
Grab the next digit (6) from the dividend, add it to 19, then carry on: 196 / 72

Moving on to step 4:
72 can be fit into 196 2 times, resulting in a remainder of 52.
Record the quotient 2 as the next digit in the result. 
Result so far: 72.0
If we take 144 away from 196, we end up with 52.
Grab the next digit (4) from the dividend, add it to 52, then carry on: 524 / 72

Moving on to step 5:
72 goes into 524 7 times with a remainder of 20.
Record the quotient 7 as the next digit in the result. 
Result so far: 727.0
If we take 504 away from 524, we end up with 20.
Append the next digit (0) from the dividend to 20 and continue with: 200 / 72

Moving on to step 6:
72 can be fit into 200 2 times, resulting in a remainder of 56.
The number 2 becomes the next digit in our result. 
Result so far: 7272.0
If we subtract 144 from 200, we get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

On to step 7:
When dividing 560 by 72, we get 7 with a remainder of 56.
Write down 7 as next digit of the result. 
Result so far: 7272.7
Subtract 504 from 560 to get 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Let's proceed to step 8:
The number 72 fits into 560 7 times, leaving a remainder of 56.
Put 7 as the next digit of the answer. 
Result so far: 7272.77
Subtracting 504 from 560 leaves us with 56.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

The final result is 7272.77 with a remainder of 0.056.