719881 ÷ 20 
The aim is to understand the frequency of 20 in 719881.

Let's proceed to step 1:
7 divided by 20 is 0 with a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 20

Let's proceed to step 2:
The number 20 fits into 71 3 times, leaving a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 3.0
The remainder is 11 after subtracting 60 from 71.
Grab the next digit (9) from the dividend, add it to 11, then carry on: 119 / 20

Going ahead to step 3:
When dividing 119 by 20, we get 5 with a remainder of 19.
Record the quotient 5 as the next digit in the result. 
Result so far: 35.0
The remainder is 19 after subtracting 100 from 119.
Include the next digit (8) from the dividend after 19, then repeat: 198 / 20

On to step 4:
20 can be fit into 198 9 times, resulting in a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 359.0
If we subtract 180 from 198, we get 18.
Grab the next digit (8) from the dividend, add it to 18, then carry on: 188 / 20

On to step 5:
20 goes into 188 9 times with a remainder of 8.
Put 9 as the next digit of the answer. 
Result so far: 3599.0
The remainder is 8 after subtracting 180 from 188.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 20

Moving on to step 6:
If we divide 81 by 20, we get 4 and a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 35994.0
If we take 80 away from 81, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 7:
The number 20 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 35994.0
If we take 0 away from 10, we end up 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:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 35994.05
Subtracting 100 from 100 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 9:
0 divided by 20 is 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 35994.05
If we take 0 away from 0, we end up 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 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 35994.05
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.

After the division, we end up with 35994.05 and a remainder of 0.0.