Let's divide 665868 by 72
The aim is to understand the frequency of 72 in 665868.

Going ahead to step 1:
If we divide 6 by 72, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 72

Moving on to step 2:
72 can be fit into 66 0 times, resulting in a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Fetch the next digit (5) from the dividend, attach it to 66 and continue: 665 / 72

Step 3:
72 can be fit into 665 9 times, resulting in a remainder of 17.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
The remainder is 17 after subtracting 648 from 665.
Append the next digit (8) from the dividend to 17 and continue with: 178 / 72

On to step 4:
72 goes into 178 2 times with a remainder of 34.
The number 2 becomes the next digit in our result. 
Result so far: 92.0
Deduct 144 from 178 and we're left with 34.
Take the next digit (6) from the dividend and append it to 34, then repeat: 346 / 72

Let's proceed to step 5:
If we divide 346 by 72, we get 4 and a remainder of 58.
The next digit of our result is 4. 
Result so far: 924.0
Deduct 288 from 346 and we're left with 58.
Bring next digit (8) of the dividend behind the 58 and repeat the process: 588 / 72

Step 6:
72 can be fit into 588 8 times, resulting in a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 9248.0
Deduct 576 from 588 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 7:
72 goes into 120 1 times with a remainder of 48.
The next digit of our result is 1. 
Result so far: 9248.1
If we subtract 72 from 120, we get 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 8:
When dividing 480 by 72, we get 6 with a remainder of 48.
The next digit of our result is 6. 
Result so far: 9248.16
Deduct 432 from 480 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

On to step 9:
When dividing 480 by 72, we get 6 with a remainder of 48.
The number 6 becomes the next digit in our result. 
Result so far: 9248.166
If we take 432 away from 480, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 9248.166, with a leftover of 0.0048.