310790 divided by 20 
The aim is to understand the frequency of 20 in 310790.

Let's proceed to step 1:
If we divide 3 by 20, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 20

Going ahead to step 2:
20 can be fit into 31 1 times, resulting in a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 20 from 31 to get 11.
Append the next digit (0) from the dividend to 11 and continue with: 110 / 20

On to step 3:
When dividing 110 by 20, we get 5 with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 100 from 110 and we're left with 10.
Fetch the next digit (7) from the dividend, attach it to 10 and continue: 107 / 20

Moving on to step 4:
20 goes into 107 5 times with a remainder of 7.
Record the quotient 5 as the next digit in the result. 
Result so far: 155.0
If we subtract 100 from 107, we get 7.
Include the next digit (9) from the dividend after 7, then repeat: 79 / 20

Moving on to step 5:
The number 20 fits into 79 3 times, leaving a remainder of 19.
Record the quotient 3 as the next digit in the result. 
Result so far: 1553.0
Subtract 60 from 79 to get 19.
Include the next digit (0) from the dividend after 19, then repeat: 190 / 20

Going ahead to step 6:
The number 20 fits into 190 9 times, leaving a remainder of 10.
Use 9 as the next digit of our solution. 
Result so far: 15539.0
The remainder is 10 after subtracting 180 from 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 7:
20 goes into 100 5 times with a remainder of 0.
Put 5 as the next digit of the answer. 
Result so far: 15539.5
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.

Going ahead to step 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 15539.5
Subtract 0 from 0 to 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.

Advancing 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: 15539.5
Deduct 0 from 0 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.

In conclusion, the division gives 15539.5 with a balance of 0.0.