We're dividing 357406 by 72 
The aim is to understand the frequency of 72 in 357406.

On to step 1:
If we divide 3 by 72, we get 0 and a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 72

On to step 2:
72 goes into 35 0 times with a remainder of 35.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 35, we get 35.
Bring next digit (7) of the dividend behind the 35 and repeat the process: 357 / 72

Going ahead to step 3:
If we divide 357 by 72, we get 4 and a remainder of 69.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtract 288 from 357 to get 69.
Fetch the next digit (4) from the dividend, attach it to 69 and continue: 694 / 72

Going ahead to step 4:
When dividing 694 by 72, we get 9 with a remainder of 46.
Put 9 as the next digit of the answer. 
Result so far: 49.0
Deduct 648 from 694 and we're left with 46.
Fetch the next digit (0) from the dividend, attach it to 46 and continue: 460 / 72

Let's proceed to step 5:
If we divide 460 by 72, we get 6 and a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 496.0
If we take 432 away from 460, we end up with 28.
Fetch the next digit (6) from the dividend, attach it to 28 and continue: 286 / 72

On to step 6:
The number 72 fits into 286 3 times, leaving a remainder of 70.
Use 3 as the next digit of our solution. 
Result so far: 4963.0
If we subtract 216 from 286, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Step 7:
72 can be fit into 700 9 times, resulting in a remainder of 52.
Write down 9 as next digit of the result. 
Result so far: 4963.9
If we subtract 648 from 700, we get 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 8:
When dividing 520 by 72, we get 7 with a remainder of 16.
The number 7 becomes the next digit in our result. 
Result so far: 4963.97
Subtract 504 from 520 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
When dividing 160 by 72, we get 2 with a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 4963.972
Deduct 144 from 160 and we're left 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.

Let's proceed to step 10:
If we divide 160 by 72, we get 2 and a remainder of 16.
The number 2 becomes the next digit in our result. 
Result so far: 4963.9722
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.

The final result is 4963.9722 with a remainder of 0.00016.