We divide 343809 by 72
The aim is to understand the frequency of 72 in 343809.

Step 1:
When dividing 3 by 72, we get 0 with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Include the next digit (4) from the dividend after 3, then repeat: 34 / 72

On to step 2:
If we divide 34 by 72, we get 0 and a remainder of 34.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 34 leaves us with 34.
Bring next digit (3) of the dividend behind the 34 and repeat the process: 343 / 72

Let's proceed to step 3:
72 can be fit into 343 4 times, resulting in a remainder of 55.
The next digit of our result is 4. 
Result so far: 4.0
If we subtract 288 from 343, we get 55.
Fetch the next digit (8) from the dividend, attach it to 55 and continue: 558 / 72

Going ahead to step 4:
If we divide 558 by 72, we get 7 and a remainder of 54.
The next digit of our result is 7. 
Result so far: 47.0
If we take 504 away from 558, we end up with 54.
Grab the next digit (0) from the dividend, add it to 54, then carry on: 540 / 72

Going ahead to step 5:
The number 72 fits into 540 7 times, leaving a remainder of 36.
Put 7 as the next digit of the answer. 
Result so far: 477.0
Subtracting 504 from 540 leaves us with 36.
Fetch the next digit (9) from the dividend, attach it to 36 and continue: 369 / 72

Moving on to step 6:
72 goes into 369 5 times with a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 4775.0
Deduct 360 from 369 and we're left with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 7:
72 goes into 90 1 times with a remainder of 18.
The next digit of our result is 1. 
Result so far: 4775.1
Subtract 72 from 90 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 8:
72 can be fit into 180 2 times, resulting in a remainder of 36.
The number 2 becomes the next digit in our result. 
Result so far: 4775.12
Subtract 144 from 180 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 9:
The number 72 fits into 360 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 4775.125
Subtract 360 from 360 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.

On to step 10:
72 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 4775.125
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 11:
72 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 4775.125
Deduct 0 from 0 and we're left with 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 outcome is 4775.125, with a leftover of 0.0.