743538 divided by 20 
The aim is to understand the frequency of 20 in 743538.

Moving on to step 1:
When dividing 7 by 20, we get 0 with a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Bring next digit (4) of the dividend behind the 7 and repeat the process: 74 / 20

Moving on to step 2:
74 divided by 20 is 3 with a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 60 from 74, we get 14.
Grab the next digit (3) from the dividend, add it to 14, then carry on: 143 / 20

Going ahead to step 3:
When dividing 143 by 20, we get 7 with a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 37.0
If we subtract 140 from 143, we get 3.
Take the next digit (5) from the dividend and append it to 3, then repeat: 35 / 20

Going ahead to step 4:
When dividing 35 by 20, we get 1 with a remainder of 15.
Use 1 as the next digit of our solution. 
Result so far: 371.0
Deduct 20 from 35 and we're left with 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 20

Moving on to step 5:
When dividing 153 by 20, we get 7 with a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 3717.0
Deduct 140 from 153 and we're left with 13.
Bring next digit (8) of the dividend behind the 13 and repeat the process: 138 / 20

Step 6:
138 divided by 20 is 6 with a remainder of 18.
Record the quotient 6 as the next digit in the result. 
Result so far: 37176.0
Subtracting 120 from 138 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 7:
20 can be fit into 180 9 times, resulting in a remainder of 0.
The next digit of our result is 9. 
Result so far: 37176.9
The remainder is 0 after subtracting 180 from 180.
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:
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: 37176.9
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.

Step 9:
0 divided by 20 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 37176.9
Subtracting 0 from 0 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.

The final outcome is 37176.9, with a leftover of 0.0.