We look at the division of 359571 by 19 
The aim is to understand the frequency of 19 in 359571.

Advancing to step 1:
19 goes into 3 0 times with a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (5) of the dividend behind the 3 and repeat the process: 35 / 19

Moving on to step 2:
19 can be fit into 35 1 times, resulting in a remainder of 16.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 19 from 35 to get 16.
Take the next digit (9) from the dividend and append it to 16, then repeat: 169 / 19

Advancing to step 3:
19 can be fit into 169 8 times, resulting in a remainder of 17.
Write down 8 as next digit of the result. 
Result so far: 18.0
If we take 152 away from 169, we end up with 17.
Take the next digit (5) from the dividend and append it to 17, then repeat: 175 / 19

Moving on to step 4:
19 goes into 175 9 times with a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 189.0
Subtracting 171 from 175 leaves us with 4.
Append the next digit (7) from the dividend to 4 and continue with: 47 / 19

Going ahead to step 5:
If we divide 47 by 19, we get 2 and a remainder of 9.
The next digit of our result is 2. 
Result so far: 1892.0
The remainder is 9 after subtracting 38 from 47.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 19

Advancing to step 6:
When dividing 91 by 19, we get 4 with a remainder of 15.
Use 4 as the next digit of our solution. 
Result so far: 18924.0
Subtract 76 from 91 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.

Step 7:
19 can be fit into 150 7 times, resulting in a remainder of 17.
Put 7 as the next digit of the answer. 
Result so far: 18924.7
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.

Let's proceed to step 8:
If we divide 170 by 19, we get 8 and a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 18924.78
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.

Moving on to step 9:
19 can be fit into 180 9 times, resulting in a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 18924.789
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.

Let's proceed to step 10:
If we divide 90 by 19, we get 4 and a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 18924.7894
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.

On to step 11:
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: 18924.78947
Deduct 133 from 140 and we're left 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.

Step 12:
70 divided by 19 is 3 with a remainder of 13.
Put 3 as the next digit of the answer. 
Result so far: 18924.789473
If we subtract 57 from 70, we get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Moving on to step 13:
19 can be fit into 130 6 times, resulting in a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 18924.7894736
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.

Step 14:
The number 19 fits into 160 8 times, leaving a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 18924.78947368
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.

The final outcome is 18924.78947368, with a leftover of 8e-09.