343864 divided by 72 
The aim is to understand the frequency of 72 in 343864.

Going ahead to step 1:
If we divide 3 by 72, we get 0 and a remainder of 3.
Write down 0 as next digit of 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

Moving on to step 2:
The number 72 fits into 34 0 times, leaving a remainder of 34.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 34, we get 34.
Fetch the next digit (3) from the dividend, attach it to 34 and continue: 343 / 72

Let's proceed to step 3:
If we divide 343 by 72, we get 4 and a remainder of 55.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 288 from 343 and we're left with 55.
Take the next digit (8) from the dividend and append it to 55, then repeat: 558 / 72

Going ahead to step 4:
558 divided by 72 is 7 with a remainder of 54.
The number 7 becomes the next digit in our result. 
Result so far: 47.0
If we subtract 504 from 558, we get 54.
Bring next digit (6) of the dividend behind the 54 and repeat the process: 546 / 72

Moving on to step 5:
The number 72 fits into 546 7 times, leaving a remainder of 42.
Use 7 as the next digit of our solution. 
Result so far: 477.0
Subtract 504 from 546 to get 42.
Include the next digit (4) from the dividend after 42, then repeat: 424 / 72

Moving on to step 6:
72 goes into 424 5 times with a remainder of 64.
Record the quotient 5 as the next digit in the result. 
Result so far: 4775.0
Deduct 360 from 424 and we're left with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Advancing to step 7:
The number 72 fits into 640 8 times, leaving a remainder of 64.
Record the quotient 8 as the next digit in the result. 
Result so far: 4775.8
The remainder is 64 after subtracting 576 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Moving on to step 8:
72 can be fit into 640 8 times, resulting in a remainder of 64.
Put 8 as the next digit of the answer. 
Result so far: 4775.88
The remainder is 64 after subtracting 576 from 640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The quotient of the division is 4775.88, and the remainder is 0.064.