351152 divided by 20 
The aim is to understand the frequency of 20 in 351152.

Step 1:
20 can be fit into 3 0 times, resulting in 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 (5) from the dividend to 3 and continue with: 35 / 20

On to step 2:
20 goes into 35 1 times with a remainder of 15.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtracting 20 from 35 leaves us with 15.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 20

Step 3:
20 can be fit into 151 7 times, resulting in a remainder of 11.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
If we subtract 140 from 151, we get 11.
Fetch the next digit (1) from the dividend, attach it to 11 and continue: 111 / 20

Moving on to step 4:
The number 20 fits into 111 5 times, leaving a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 175.0
Deduct 100 from 111 and we're left with 11.
Take the next digit (5) from the dividend and append it to 11, then repeat: 115 / 20

On to step 5:
115 divided by 20 is 5 with a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 1755.0
The remainder is 15 after subtracting 100 from 115.
Fetch the next digit (2) from the dividend, attach it to 15 and continue: 152 / 20

Going ahead to step 6:
If we divide 152 by 20, we get 7 and a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 17557.0
Subtract 140 from 152 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
When dividing 120 by 20, we get 6 with a remainder of 0.
Record the quotient 6 as the next digit in the result. 
Result so far: 17557.6
Subtract 120 from 120 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.

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: 17557.6
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.

Going ahead to step 9:
When dividing 0 by 20, we get 0 with a remainder of 0.
The next digit of our result is 0. 
Result so far: 17557.6
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.

The final result is 17557.6 with a remainder of 0.0.