We look at the division of 579688 by 19 
The aim is to understand the frequency of 19 in 579688.

On to step 1:
5 divided by 19 is 0 with a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Include the next digit (7) from the dividend after 5, then repeat: 57 / 19

Let's proceed to step 2:
If we divide 57 by 19, we get 3 and a remainder of 0.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 57 from 57 leaves us with 0.
Grab the next digit (9) from the dividend, add it to 0, then carry on: 9 / 19

Advancing to step 3:
19 goes into 9 0 times with a remainder of 9.
Write down 0 as next digit of the result. 
Result so far: 30.0
If we subtract 0 from 9, we get 9.
Take the next digit (6) from the dividend and append it to 9, then repeat: 96 / 19

Step 4:
19 goes into 96 5 times with a remainder of 1.
The next digit of our result is 5. 
Result so far: 305.0
If we take 95 away from 96, we end up with 1.
Fetch the next digit (8) from the dividend, attach it to 1 and continue: 18 / 19

On to step 5:
18 divided by 19 is 0 with a remainder of 18.
Use 0 as the next digit of our solution. 
Result so far: 3050.0
Deduct 0 from 18 and we're left with 18.
Append the next digit (8) from the dividend to 18 and continue with: 188 / 19

Let's proceed to step 6:
19 can be fit into 188 9 times, resulting in a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 30509.0
The remainder is 17 after subtracting 171 from 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Going ahead to step 7:
19 goes into 170 8 times with a remainder of 18.
The number 8 becomes the next digit in our result. 
Result so far: 30509.8
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.

Let's proceed to step 8:
The number 19 fits into 180 9 times, leaving a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 30509.89
If we take 171 away from 180, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 9:
When dividing 90 by 19, we get 4 with a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 30509.894
Deduct 76 from 90 and we're left 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.

Advancing to step 10:
When dividing 140 by 19, we get 7 with a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 30509.8947
If we take 133 away from 140, we end up with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 11:
70 divided by 19 is 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 30509.89473
Subtracting 57 from 70 leaves us 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.

Going ahead to step 12:
130 divided by 19 is 6 with a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 30509.894736
Deduct 114 from 130 and we're left with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 13:
19 goes into 160 8 times with a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 30509.8947368
The remainder is 8 after subtracting 152 from 160.
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 14:
80 divided by 19 is 4 with a remainder of 4.
Write down 4 as next digit of the result. 
Result so far: 30509.89473684
If we subtract 76 from 80, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Our division results in 30509.89473684 with a remaining 4e-09.