We divide 875570 by 20
The aim is to understand the frequency of 20 in 875570.

Advancing to step 1:
20 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Append the next digit (7) from the dividend to 8 and continue with: 87 / 20

Step 2:
20 can be fit into 87 4 times, resulting in a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 4.0
The remainder is 7 after subtracting 80 from 87.
Bring next digit (5) of the dividend behind the 7 and repeat the process: 75 / 20

Going ahead to step 3:
75 divided by 20 is 3 with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 43.0
Subtract 60 from 75 to get 15.
Take the next digit (5) from the dividend and append it to 15, then repeat: 155 / 20

Step 4:
155 divided by 20 is 7 with a remainder of 15.
Write down 7 as next digit of the result. 
Result so far: 437.0
Subtract 140 from 155 to get 15.
Grab the next digit (7) from the dividend, add it to 15, then carry on: 157 / 20

On to step 5:
20 goes into 157 7 times with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 4377.0
Deduct 140 from 157 and we're left with 17.
Append the next digit (0) from the dividend to 17 and continue with: 170 / 20

Advancing to step 6:
If we divide 170 by 20, we get 8 and a remainder of 10.
The number 8 becomes the next digit in our result. 
Result so far: 43778.0
Subtract 160 from 170 to get 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 7:
100 divided by 20 is 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 43778.5
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.

Let's proceed to step 8:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 43778.5
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.

On to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 43778.5
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.

Our division results in 43778.5 with a remaining 0.0.