We divide 910515 by 20
The aim is to understand the frequency of 20 in 910515.

Advancing to step 1:
If we divide 9 by 20, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 20

Let's proceed to step 2:
91 divided by 20 is 4 with a remainder of 11.
The next digit of our result is 4. 
Result so far: 4.0
The remainder is 11 after subtracting 80 from 91.
Take the next digit (0) from the dividend and append it to 11, then repeat: 110 / 20

Let's proceed to step 3:
20 goes into 110 5 times with a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 45.0
Subtract 100 from 110 to get 10.
Fetch the next digit (5) from the dividend, attach it to 10 and continue: 105 / 20

Advancing to step 4:
If we divide 105 by 20, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 455.0
Deduct 100 from 105 and we're left with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 20

On to step 5:
20 goes into 51 2 times with a remainder of 11.
Write down 2 as next digit of the result. 
Result so far: 4552.0
If we subtract 40 from 51, we get 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 20

Moving on to step 6:
The number 20 fits into 115 5 times, leaving a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 45525.0
Subtract 100 from 115 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.

Moving on to step 7:
20 goes into 150 7 times with a remainder of 10.
The next digit of our result is 7. 
Result so far: 45525.7
If we take 140 away from 150, 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.

On to step 8:
100 divided by 20 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 45525.75
If we subtract 100 from 100, 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.

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: 45525.75
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.

Let's proceed to step 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 45525.75
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.

After the division, we end up with 45525.75 and a remainder of 0.0.