We're dividing 50521904 by 720 
The aim is to understand the frequency of 720 in 50521904.

On to step 1:
When dividing 5 by 720, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Append the next digit (0) from the dividend to 5 and continue with: 50 / 720

Advancing to step 2:
If we divide 50 by 720, we get 0 and a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Bring next digit (5) of the dividend behind the 50 and repeat the process: 505 / 720

Step 3:
The number 720 fits into 505 0 times, leaving a remainder of 505.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 505 after subtracting 0 from 505.
Grab the next digit (2) from the dividend, add it to 505, then carry on: 5052 / 720

Moving on to step 4:
720 can be fit into 5052 7 times, resulting in a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 7.0
Subtract 5040 from 5052 to get 12.
Take the next digit (1) from the dividend and append it to 12, then repeat: 121 / 720

On to step 5:
121 divided by 720 is 0 with a remainder of 121.
The next digit of our result is 0. 
Result so far: 70.0
If we take 0 away from 121, we end up with 121.
Grab the next digit (9) from the dividend, add it to 121, then carry on: 1219 / 720

Step 6:
When dividing 1219 by 720, we get 1 with a remainder of 499.
Use 1 as the next digit of our solution. 
Result so far: 701.0
Subtract 720 from 1219 to get 499.
Take the next digit (0) from the dividend and append it to 499, then repeat: 4990 / 720

Advancing to step 7:
4990 divided by 720 is 6 with a remainder of 670.
Put 6 as the next digit of the answer. 
Result so far: 7016.0
If we take 4320 away from 4990, we end up with 670.
Append the next digit (4) from the dividend to 670 and continue with: 6704 / 720

On to step 8:
When dividing 6704 by 720, we get 9 with a remainder of 224.
Write down 9 as next digit of the result. 
Result so far: 70169.0
The remainder is 224 after subtracting 6480 from 6704.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Advancing to step 9:
If we divide 2240 by 720, we get 3 and a remainder of 80.
Record the quotient 3 as the next digit in the result. 
Result so far: 70169.3
The remainder is 80 after subtracting 2160 from 2240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 10:
If we divide 800 by 720, we get 1 and a remainder of 80.
Write down 1 as next digit of the result. 
Result so far: 70169.31
Subtract 720 from 800 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

On to step 11:
720 can be fit into 800 1 times, resulting in a remainder of 80.
The next digit of our result is 1. 
Result so far: 70169.311
The remainder is 80 after subtracting 720 from 800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

The final result is 70169.311 with a remainder of 0.008.