We're dividing 157804 by 72 
The aim is to understand the frequency of 72 in 157804.

Step 1:
If we divide 1 by 72, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (5) from the dividend, attach it to 1 and continue: 15 / 72

Advancing to step 2:
When dividing 15 by 72, we get 0 with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Bring next digit (7) of the dividend behind the 15 and repeat the process: 157 / 72

Going ahead to step 3:
If we divide 157 by 72, we get 2 and a remainder of 13.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we take 144 away from 157, we end up with 13.
Include the next digit (8) from the dividend after 13, then repeat: 138 / 72

Going ahead to step 4:
When dividing 138 by 72, we get 1 with a remainder of 66.
Put 1 as the next digit of the answer. 
Result so far: 21.0
Subtract 72 from 138 to get 66.
Append the next digit (0) from the dividend to 66 and continue with: 660 / 72

Going ahead to step 5:
660 divided by 72 is 9 with a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 219.0
Deduct 648 from 660 and we're left with 12.
Fetch the next digit (4) from the dividend, attach it to 12 and continue: 124 / 72

Advancing to step 6:
72 goes into 124 1 times with a remainder of 52.
Put 1 as the next digit of the answer. 
Result so far: 2191.0
Subtracting 72 from 124 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Going ahead to step 7:
The number 72 fits into 520 7 times, leaving a remainder of 16.
The number 7 becomes the next digit in our result. 
Result so far: 2191.7
The remainder is 16 after subtracting 504 from 520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 8:
160 divided by 72 is 2 with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 2191.72
The remainder is 16 after subtracting 144 from 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Let's proceed to step 9:
If we divide 160 by 72, we get 2 and a remainder of 16.
The next digit of our result is 2. 
Result so far: 2191.722
If we take 144 away from 160, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 2191.722, and the remainder is 0.0016.