We look at the division of 803188 by 19 
The aim is to understand the frequency of 19 in 803188.

Moving on to step 1:
If we divide 8 by 19, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 19

On to step 2:
If we divide 80 by 19, we get 4 and a remainder of 4.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 76 from 80 to get 4.
Bring next digit (3) of the dividend behind the 4 and repeat the process: 43 / 19

Advancing to step 3:
19 can be fit into 43 2 times, resulting in a remainder of 5.
The next digit of our result is 2. 
Result so far: 42.0
Subtracting 38 from 43 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 19

Let's proceed to step 4:
19 can be fit into 51 2 times, resulting in a remainder of 13.
The next digit of our result is 2. 
Result so far: 422.0
Deduct 38 from 51 and we're left with 13.
Grab the next digit (8) from the dividend, add it to 13, then carry on: 138 / 19

Advancing to step 5:
When dividing 138 by 19, we get 7 with a remainder of 5.
Record the quotient 7 as the next digit in the result. 
Result so far: 4227.0
If we take 133 away from 138, we end up with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 19

Advancing to step 6:
58 divided by 19 is 3 with a remainder of 1.
Write down 3 as next digit of the result. 
Result so far: 42273.0
The remainder is 1 after subtracting 57 from 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
The number 19 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 42273.0
Subtracting 0 from 10 leaves us 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.

Going ahead to step 8:
If we divide 100 by 19, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 42273.05
If we take 95 away from 100, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
When dividing 50 by 19, we get 2 with a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 42273.052
If we take 38 away from 50, we end up 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.

Step 10:
When dividing 120 by 19, we get 6 with a remainder of 6.
Put 6 as the next digit of the answer. 
Result so far: 42273.0526
If we subtract 114 from 120, we get 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Going ahead to step 11:
19 goes into 60 3 times with a remainder of 3.
The next digit of our result is 3. 
Result so far: 42273.05263
Deduct 57 from 60 and we're left with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 12:
19 can be fit into 30 1 times, resulting in a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 42273.052631
Subtract 19 from 30 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 13:
If we divide 110 by 19, we get 5 and a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 42273.0526315
Subtract 95 from 110 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Going ahead to step 14:
The number 19 fits into 150 7 times, leaving a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 42273.05263157
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.

The final outcome is 42273.05263157, with a leftover of 1.7e-08.