We look at the division of 353317 by 72 
The aim is to understand the frequency of 72 in 353317.

Advancing to step 1:
The number 72 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 72

Going ahead to step 2:
If we divide 35 by 72, we get 0 and a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 35 leaves us with 35.
Grab the next digit (3) from the dividend, add it to 35, then carry on: 353 / 72

Advancing to step 3:
The number 72 fits into 353 4 times, leaving a remainder of 65.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
If we subtract 288 from 353, we get 65.
Append the next digit (3) from the dividend to 65 and continue with: 653 / 72

On to step 4:
The number 72 fits into 653 9 times, leaving a remainder of 5.
Put 9 as the next digit of the answer. 
Result so far: 49.0
Deduct 648 from 653 and we're left with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 72

Moving on to step 5:
51 divided by 72 is 0 with a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 490.0
The remainder is 51 after subtracting 0 from 51.
Include the next digit (7) from the dividend after 51, then repeat: 517 / 72

Going ahead to step 6:
517 divided by 72 is 7 with a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 4907.0
Subtract 504 from 517 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
The number 72 fits into 130 1 times, leaving a remainder of 58.
Record the quotient 1 as the next digit in the result. 
Result so far: 4907.1
Deduct 72 from 130 and we're left with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Going ahead to step 8:
72 can be fit into 580 8 times, resulting in a remainder of 4.
The next digit of our result is 8. 
Result so far: 4907.18
The remainder is 4 after subtracting 576 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
When dividing 40 by 72, we get 0 with a remainder of 40.
Use 0 as the next digit of our solution. 
Result so far: 4907.18
Deduct 0 from 40 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Moving on to step 10:
When dividing 400 by 72, we get 5 with a remainder of 40.
The number 5 becomes the next digit in our result. 
Result so far: 4907.1805
Subtracting 360 from 400 leaves us with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

On to step 11:
When dividing 400 by 72, we get 5 with a remainder of 40.
Use 5 as the next digit of our solution. 
Result so far: 4907.18055
If we subtract 360 from 400, we get 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

In conclusion, the division gives 4907.18055 with a balance of 4e-05.