We look at the division of 539593 by 19 
The aim is to understand the frequency of 19 in 539593.

On to step 1:
5 divided by 19 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Include the next digit (3) from the dividend after 5, then repeat: 53 / 19

Let's proceed to step 2:
When dividing 53 by 19, we get 2 with a remainder of 15.
Write down 2 as next digit of the result. 
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

On to step 3:
19 can be fit into 159 8 times, resulting in a remainder of 7.
The next digit of our result is 8. 
Result so far: 28.0
Subtracting 152 from 159 leaves us with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 19

Going ahead to step 4:
If we divide 75 by 19, we get 3 and a remainder of 18.
The next digit of our result is 3. 
Result so far: 283.0
If we subtract 57 from 75, we get 18.
Append the next digit (9) from the dividend to 18 and continue with: 189 / 19

Going ahead to step 5:
The number 19 fits into 189 9 times, leaving a remainder of 18.
The number 9 becomes the next digit in our result. 
Result so far: 2839.0
Deduct 171 from 189 and we're left with 18.
Append the next digit (3) from the dividend to 18 and continue with: 183 / 19

Advancing to step 6:
19 goes into 183 9 times with a remainder of 12.
The number 9 becomes the next digit in our result. 
Result so far: 28399.0
Subtracting 171 from 183 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 7:
The number 19 fits into 120 6 times, leaving a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 28399.6
Subtracting 114 from 120 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 8:
When dividing 60 by 19, we get 3 with a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 28399.63
If we subtract 57 from 60, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 9:
When dividing 30 by 19, we get 1 with a remainder of 11.
Put 1 as the next digit of the answer. 
Result so far: 28399.631
Subtracting 19 from 30 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 10:
19 can be fit into 110 5 times, resulting in a remainder of 15.
The number 5 becomes the next digit in our result. 
Result so far: 28399.6315
If we take 95 away from 110, we end up with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Moving on to step 11:
19 goes into 150 7 times with a remainder of 17.
The next digit of our result is 7. 
Result so far: 28399.63157
The remainder is 17 after subtracting 133 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Let's proceed to step 12:
170 divided by 19 is 8 with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 28399.631578
If we subtract 152 from 170, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 13:
19 goes into 180 9 times with a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 28399.6315789
If we subtract 171 from 180, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 14:
The number 19 fits into 90 4 times, leaving a remainder of 14.
Put 4 as the next digit of the answer. 
Result so far: 28399.63157894
If we take 76 away from 90, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

The final outcome is 28399.63157894, with a leftover of 1.4e-08.