We look at the division of 671673 by 72 
The aim is to understand the frequency of 72 in 671673.

Going ahead to step 1:
6 divided by 72 is 0 with a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 72

Going ahead to step 2:
72 can be fit into 67 0 times, resulting in a remainder of 67.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 67 to get 67.
Include the next digit (1) from the dividend after 67, then repeat: 671 / 72

Step 3:
The number 72 fits into 671 9 times, leaving a remainder of 23.
The next digit of our result is 9. 
Result so far: 9.0
Deduct 648 from 671 and we're left with 23.
Take the next digit (6) from the dividend and append it to 23, then repeat: 236 / 72

On to step 4:
The number 72 fits into 236 3 times, leaving a remainder of 20.
The number 3 becomes the next digit in our result. 
Result so far: 93.0
Subtracting 216 from 236 leaves us with 20.
Take the next digit (7) from the dividend and append it to 20, then repeat: 207 / 72

Let's proceed to step 5:
207 divided by 72 is 2 with a remainder of 63.
The next digit of our result is 2. 
Result so far: 932.0
If we take 144 away from 207, we end up with 63.
Fetch the next digit (3) from the dividend, attach it to 63 and continue: 633 / 72

Moving on to step 6:
633 divided by 72 is 8 with a remainder of 57.
Use 8 as the next digit of our solution. 
Result so far: 9328.0
The remainder is 57 after subtracting 576 from 633.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Let's proceed to step 7:
72 goes into 570 7 times with a remainder of 66.
Record the quotient 7 as the next digit in the result. 
Result so far: 9328.7
Deduct 504 from 570 and we're left with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 8:
If we divide 660 by 72, we get 9 and a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 9328.79
Deduct 648 from 660 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.

On to step 9:
120 divided by 72 is 1 with a remainder of 48.
Record the quotient 1 as the next digit in the result. 
Result so far: 9328.791
Subtract 72 from 120 to 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.

Moving on to step 10:
The number 72 fits into 480 6 times, leaving a remainder of 48.
Write down 6 as next digit of the result. 
Result so far: 9328.7916
Subtracting 432 from 480 leaves us 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.

Let's proceed to step 11:
The number 72 fits into 480 6 times, leaving a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 9328.79166
Subtracting 432 from 480 leaves us 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 result is 9328.79166 with a remainder of 4.8e-05.