921690 divided by 72 
The aim is to understand the frequency of 72 in 921690.

Let's proceed to step 1:
If we divide 9 by 72, we get 0 and a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Bring next digit (2) of the dividend behind the 9 and repeat the process: 92 / 72

Advancing to step 2:
If we divide 92 by 72, we get 1 and a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 72 from 92 to get 20.
Include the next digit (1) from the dividend after 20, then repeat: 201 / 72

Going ahead to step 3:
72 goes into 201 2 times with a remainder of 57.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
The remainder is 57 after subtracting 144 from 201.
Append the next digit (6) from the dividend to 57 and continue with: 576 / 72

Moving on to step 4:
72 can be fit into 576 8 times, resulting in a remainder of 0.
The number 8 becomes the next digit in our result. 
Result so far: 128.0
Subtract 576 from 576 to get 0.
Take the next digit (9) from the dividend and append it to 0, then repeat: 9 / 72

Going ahead to step 5:
When dividing 9 by 72, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 1280.0
Subtract 0 from 9 to get 9.
Bring next digit (0) of the dividend behind the 9 and repeat the process: 90 / 72

Moving on to step 6:
The number 72 fits into 90 1 times, leaving a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 12801.0
If we take 72 away from 90, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
If we divide 180 by 72, we get 2 and a remainder of 36.
Use 2 as the next digit of our solution. 
Result so far: 12801.2
The remainder is 36 after subtracting 144 from 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 8:
If we divide 360 by 72, we get 5 and a remainder of 0.
The next digit of our result is 5. 
Result so far: 12801.25
If we subtract 360 from 360, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
0 divided by 72 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 12801.25
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
0 divided by 72 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 12801.25
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 12801.25 with a remainder of 0.0.