721055 divided by 20 
The aim is to understand the frequency of 20 in 721055.

Going ahead to step 1:
The number 20 fits into 7 0 times, leaving a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 20

Going ahead to step 2:
20 can be fit into 72 3 times, resulting in a remainder of 12.
Write down 3 as next digit of the result. 
Result so far: 3.0
Deduct 60 from 72 and we're left with 12.
Append the next digit (1) from the dividend to 12 and continue with: 121 / 20

Step 3:
20 goes into 121 6 times with a remainder of 1.
Put 6 as the next digit of the answer. 
Result so far: 36.0
Deduct 120 from 121 and we're left with 1.
Include the next digit (0) from the dividend after 1, then repeat: 10 / 20

On to step 4:
20 goes into 10 0 times with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 360.0
The remainder is 10 after subtracting 0 from 10.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 20

Step 5:
The number 20 fits into 105 5 times, leaving a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 3605.0
Deduct 100 from 105 and we're left with 5.
Take the next digit (5) from the dividend and append it to 5, then repeat: 55 / 20

Moving on to step 6:
20 goes into 55 2 times with a remainder of 15.
Record the quotient 2 as the next digit in the result. 
Result so far: 36052.0
Subtract 40 from 55 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
20 can be fit into 150 7 times, resulting in a remainder of 10.
Write down 7 as next digit of the result. 
Result so far: 36052.7
Subtracting 140 from 150 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
20 can be fit into 100 5 times, resulting in a remainder of 0.
The next digit of our result is 5. 
Result so far: 36052.75
Deduct 100 from 100 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.

Going ahead to step 9:
0 divided by 20 is 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 36052.75
Subtracting 0 from 0 leaves us 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.

Advancing to step 10:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 36052.75
If we subtract 0 from 0, we 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.

The final result is 36052.75 with a remainder of 0.0.