We look at the division of 850678 by 19 
The aim is to understand the frequency of 19 in 850678.

On to step 1:
When dividing 8 by 19, we get 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 19

On to step 2:
85 divided by 19 is 4 with a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 76 from 85 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 19

Advancing to step 3:
19 goes into 90 4 times with a remainder of 14.
Write down 4 as next digit of the result. 
Result so far: 44.0
The remainder is 14 after subtracting 76 from 90.
Fetch the next digit (6) from the dividend, attach it to 14 and continue: 146 / 19

Advancing to step 4:
If we divide 146 by 19, we get 7 and a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 447.0
If we take 133 away from 146, we end up with 13.
Include the next digit (7) from the dividend after 13, then repeat: 137 / 19

On to step 5:
When dividing 137 by 19, we get 7 with a remainder of 4.
Use 7 as the next digit of our solution. 
Result so far: 4477.0
Subtracting 133 from 137 leaves us with 4.
Grab the next digit (8) from the dividend, add it to 4, then carry on: 48 / 19

Moving on to step 6:
19 goes into 48 2 times with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 44772.0
Deduct 38 from 48 and we're left 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 7:
19 can be fit into 100 5 times, resulting in a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 44772.5
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 8:
50 divided by 19 is 2 with a remainder of 12.
Use 2 as the next digit of our solution. 
Result so far: 44772.52
If we subtract 38 from 50, we 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.

Advancing to step 9:
If we divide 120 by 19, we get 6 and a remainder of 6.
The next digit of our result is 6. 
Result so far: 44772.526
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.

On to step 10:
When dividing 60 by 19, we get 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 44772.5263
Subtract 57 from 60 to 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.

On to step 11:
30 divided by 19 is 1 with a remainder of 11.
Write down 1 as next digit of the result. 
Result so far: 44772.52631
If we subtract 19 from 30, we 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.

On to step 12:
When dividing 110 by 19, we get 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 44772.526315
The remainder is 15 after subtracting 95 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Let's proceed to step 13:
150 divided by 19 is 7 with a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 44772.5263157
Subtracting 133 from 150 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 14:
19 goes into 170 8 times with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 44772.52631578
If we take 152 away from 170, we end up 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.

The final result is 44772.52631578 with a remainder of 1.8e-08.