We look at the division of 355771 by 19 
The aim is to understand the frequency of 19 in 355771.

Let's proceed to step 1:
19 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 19

Advancing to step 2:
If we divide 35 by 19, we get 1 and a remainder of 16.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 19 away from 35, we end up with 16.
Grab the next digit (5) from the dividend, add it to 16, then carry on: 165 / 19

Advancing to step 3:
The number 19 fits into 165 8 times, leaving a remainder of 13.
Put 8 as the next digit of the answer. 
Result so far: 18.0
Deduct 152 from 165 and we're left with 13.
Fetch the next digit (7) from the dividend, attach it to 13 and continue: 137 / 19

Step 4:
19 goes into 137 7 times with a remainder of 4.
The next digit of our result is 7. 
Result so far: 187.0
Subtract 133 from 137 to get 4.
Take the next digit (7) from the dividend and append it to 4, then repeat: 47 / 19

Moving on to step 5:
The number 19 fits into 47 2 times, leaving a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 1872.0
Subtracting 38 from 47 leaves us with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 19

Moving on to step 6:
When dividing 91 by 19, we get 4 with a remainder of 15.
The next digit of our result is 4. 
Result so far: 18724.0
The remainder is 15 after subtracting 76 from 91.
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 7:
19 can be fit into 150 7 times, resulting in a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 18724.7
Subtract 133 from 150 to get 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:
19 goes into 170 8 times with a remainder of 18.
Use 8 as the next digit of our solution. 
Result so far: 18724.78
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.

Step 9:
When dividing 180 by 19, we get 9 with a remainder of 9.
Put 9 as the next digit of the answer. 
Result so far: 18724.789
Deduct 171 from 180 and we're left 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.

Going ahead to step 10:
19 goes into 90 4 times with a remainder of 14.
The number 4 becomes the next digit in our result. 
Result so far: 18724.7894
If we subtract 76 from 90, we get 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:
19 can be fit into 140 7 times, resulting in a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 18724.78947
Subtracting 133 from 140 leaves us 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.

Advancing to step 12:
The number 19 fits into 70 3 times, leaving a remainder of 13.
Record the quotient 3 as the next digit in the result. 
Result so far: 18724.789473
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.

On to step 13:
130 divided by 19 is 6 with a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 18724.7894736
The remainder is 16 after subtracting 114 from 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

On to step 14:
19 can be fit into 160 8 times, resulting in a remainder of 8.
Use 8 as the next digit of our solution. 
Result so far: 18724.78947368
If we take 152 away from 160, we end up with 8.
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 result is 18724.78947368 with a remainder of 8e-09.