We look at the division of 539442 by 19 
The aim is to understand the frequency of 19 in 539442.

Moving on to step 1:
19 goes into 5 0 times with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 19

On to step 2:
19 can be fit into 53 2 times, resulting in a remainder of 15.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 38 from 53 leaves us with 15.
Take the next digit (9) from the dividend and append it to 15, then repeat: 159 / 19

Going ahead to step 3:
19 can be fit into 159 8 times, resulting in a remainder of 7.
The number 8 becomes the next digit in our result. 
Result so far: 28.0
Subtract 152 from 159 to get 7.
Append the next digit (4) from the dividend to 7 and continue with: 74 / 19

Advancing to step 4:
The number 19 fits into 74 3 times, leaving a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 283.0
The remainder is 17 after subtracting 57 from 74.
Fetch the next digit (4) from the dividend, attach it to 17 and continue: 174 / 19

Step 5:
The number 19 fits into 174 9 times, leaving a remainder of 3.
The next digit of our result is 9. 
Result so far: 2839.0
Subtract 171 from 174 to get 3.
Take the next digit (2) from the dividend and append it to 3, then repeat: 32 / 19

Going ahead to step 6:
32 divided by 19 is 1 with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 28391.0
Deduct 19 from 32 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
The number 19 fits into 130 6 times, leaving a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 28391.6
The remainder is 16 after subtracting 114 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 8:
If we divide 160 by 19, we get 8 and a remainder of 8.
Write down 8 as next digit of the result. 
Result so far: 28391.68
If we take 152 away from 160, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 9:
19 goes into 80 4 times with a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 28391.684
Deduct 76 from 80 and we're left with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

On to step 10:
19 can be fit into 40 2 times, resulting in a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 28391.6842
Subtracting 38 from 40 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 11:
19 can be fit into 20 1 times, resulting in a remainder of 1.
Write down 1 as next digit of the result. 
Result so far: 28391.68421
Subtract 19 from 20 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Going ahead to step 12:
10 divided by 19 is 0 with a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 28391.68421
If we take 0 away from 10, 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.

Let's proceed to step 13:
100 divided by 19 is 5 with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 28391.6842105
If we subtract 95 from 100, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 14:
19 goes into 50 2 times with a remainder of 12.
The number 2 becomes the next digit in our result. 
Result so far: 28391.68421052
Subtract 38 from 50 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.

After the division, we end up with 28391.68421052 and a remainder of 1.2e-08.