578422 divided by 72 
The aim is to understand the frequency of 72 in 578422.

Step 1:
The number 72 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 72

Step 2:
72 can be fit into 57 0 times, resulting in a remainder of 57.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 57 to get 57.
Include the next digit (8) from the dividend after 57, then repeat: 578 / 72

On to step 3:
The number 72 fits into 578 8 times, leaving a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 576 away from 578, we end up with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 72

Let's proceed to step 4:
When dividing 24 by 72, we get 0 with a remainder of 24.
Write down 0 as next digit of the result. 
Result so far: 80.0
The remainder is 24 after subtracting 0 from 24.
Grab the next digit (2) from the dividend, add it to 24, then carry on: 242 / 72

Step 5:
72 can be fit into 242 3 times, resulting in a remainder of 26.
Record the quotient 3 as the next digit in the result. 
Result so far: 803.0
Deduct 216 from 242 and we're left with 26.
Bring next digit (2) of the dividend behind the 26 and repeat the process: 262 / 72

On to step 6:
72 goes into 262 3 times with a remainder of 46.
Write down 3 as next digit of the result. 
Result so far: 8033.0
The remainder is 46 after subtracting 216 from 262.
Since there are no more digits in the dividend, we add a zero to the remainder making it 460, and continue the process.

Going ahead to step 7:
If we divide 460 by 72, we get 6 and a remainder of 28.
Record the quotient 6 as the next digit in the result. 
Result so far: 8033.6
If we take 432 away from 460, we end up with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Step 8:
72 can be fit into 280 3 times, resulting in a remainder of 64.
Write down 3 as next digit of the result. 
Result so far: 8033.63
If we subtract 216 from 280, we get 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 9:
When dividing 640 by 72, we get 8 with a remainder of 64.
The number 8 becomes the next digit in our result. 
Result so far: 8033.638
If we subtract 576 from 640, we get 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 10:
72 goes into 640 8 times with a remainder of 64.
Use 8 as the next digit of our solution. 
Result so far: 8033.6388
Deduct 576 from 640 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.

After the division, we end up with 8033.6388 and a remainder of 0.00064.