We divide 664670 by 72
The aim is to understand the frequency of 72 in 664670.

On to step 1:
The number 72 fits into 6 0 times, leaving a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 72

Advancing to step 2:
72 can be fit into 66 0 times, resulting in a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Take the next digit (4) from the dividend and append it to 66, then repeat: 664 / 72

Step 3:
When dividing 664 by 72, we get 9 with a remainder of 16.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 648 from 664 to get 16.
Fetch the next digit (6) from the dividend, attach it to 16 and continue: 166 / 72

Advancing to step 4:
The number 72 fits into 166 2 times, leaving a remainder of 22.
Record the quotient 2 as the next digit in the result. 
Result so far: 92.0
If we take 144 away from 166, we end up with 22.
Append the next digit (7) from the dividend to 22 and continue with: 227 / 72

On to step 5:
72 can be fit into 227 3 times, resulting in a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 923.0
If we take 216 away from 227, we end up with 11.
Include the next digit (0) from the dividend after 11, then repeat: 110 / 72

Going ahead to step 6:
If we divide 110 by 72, we get 1 and a remainder of 38.
Write down 1 as next digit of the result. 
Result so far: 9231.0
Subtracting 72 from 110 leaves us with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

On to step 7:
72 can be fit into 380 5 times, resulting in a remainder of 20.
Put 5 as the next digit of the answer. 
Result so far: 9231.5
If we take 360 away from 380, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 8:
72 goes into 200 2 times with a remainder of 56.
The number 2 becomes the next digit in our result. 
Result so far: 9231.52
The remainder is 56 after subtracting 144 from 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 560, and continue the process.

Advancing to step 9:
If we divide 560 by 72, we get 7 and a remainder of 56.
The number 7 becomes the next digit in our result. 
Result so far: 9231.527
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 10:
When dividing 560 by 72, we get 7 with a remainder of 56.
Record the quotient 7 as the next digit in the result. 
Result so far: 9231.5277
If we subtract 504 from 560, 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.

The final result is 9231.5277 with a remainder of 0.00056.