We're dividing 163691 by 19 
The aim is to understand the frequency of 19 in 163691.

Step 1:
19 goes into 1 0 times with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 1 leaves us with 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 19

On to step 2:
19 goes into 16 0 times with a remainder of 16.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 16 to get 16.
Take the next digit (3) from the dividend and append it to 16, then repeat: 163 / 19

Moving on to step 3:
163 divided by 19 is 8 with a remainder of 11.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtracting 152 from 163 leaves us with 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 19

Going ahead to step 4:
The number 19 fits into 116 6 times, leaving a remainder of 2.
Record the quotient 6 as the next digit in the result. 
Result so far: 86.0
If we take 114 away from 116, we end up with 2.
Grab the next digit (9) from the dividend, add it to 2, then carry on: 29 / 19

Advancing to step 5:
The number 19 fits into 29 1 times, leaving a remainder of 10.
Put 1 as the next digit of the answer. 
Result so far: 861.0
Deduct 19 from 29 and we're left with 10.
Include the next digit (1) from the dividend after 10, then repeat: 101 / 19

Advancing to step 6:
When dividing 101 by 19, we get 5 with a remainder of 6.
The next digit of our result is 5. 
Result so far: 8615.0
If we take 95 away from 101, we end up with 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 7:
60 divided by 19 is 3 with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 8615.3
The remainder is 3 after subtracting 57 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Going ahead to step 8:
30 divided by 19 is 1 with a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 8615.31
Deduct 19 from 30 and we're left with 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 9:
When dividing 110 by 19, we get 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 8615.315
Subtracting 95 from 110 leaves us with 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 10:
When dividing 150 by 19, we get 7 with a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 8615.3157
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.

Going ahead to step 11:
170 divided by 19 is 8 with a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 8615.31578
Subtract 152 from 170 to get 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 12:
The number 19 fits into 180 9 times, leaving a remainder of 9.
Record the quotient 9 as the next digit in the result. 
Result so far: 8615.315789
Subtracting 171 from 180 leaves us 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.

Step 13:
19 goes into 90 4 times with a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 8615.3157894
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.

Advancing to step 14:
When dividing 140 by 19, we get 7 with a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 8615.31578947
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.

After the division, we end up with 8615.31578947 and a remainder of 7e-09.