375402 ÷ 20 
The aim is to understand the frequency of 20 in 375402.

On to step 1:
20 goes into 3 0 times with a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Append the next digit (7) from the dividend to 3 and continue with: 37 / 20

Going ahead to step 2:
20 goes into 37 1 times with a remainder of 17.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 20 away from 37, we end up with 17.
Include the next digit (5) from the dividend after 17, then repeat: 175 / 20

Advancing to step 3:
20 can be fit into 175 8 times, resulting in a remainder of 15.
The number 8 becomes the next digit in our result. 
Result so far: 18.0
Deduct 160 from 175 and we're left with 15.
Grab the next digit (4) from the dividend, add it to 15, then carry on: 154 / 20

Moving on to step 4:
154 divided by 20 is 7 with a remainder of 14.
Use 7 as the next digit of our solution. 
Result so far: 187.0
Subtract 140 from 154 to get 14.
Bring next digit (0) of the dividend behind the 14 and repeat the process: 140 / 20

On to step 5:
The number 20 fits into 140 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 1877.0
If we take 140 away from 140, we end up with 0.
Take the next digit (2) from the dividend and append it to 0, then repeat: 2 / 20

Advancing to step 6:
2 divided by 20 is 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 18770.0
If we subtract 0 from 2, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 7:
20 can be fit into 20 1 times, resulting in a remainder of 0.
Write down 1 as next digit of the result. 
Result so far: 18770.1
If we subtract 20 from 20, 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 8:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 18770.1
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.

Moving on to step 9:
20 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 18770.1
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 18770.1 and a remainder of 0.0.