641508 divided by 19 
The aim is to understand the frequency of 19 in 641508.

Let's proceed to step 1:
If we divide 6 by 19, we get 0 and a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 19

Let's proceed to step 2:
64 divided by 19 is 3 with a remainder of 7.
The next digit of our result is 3. 
Result so far: 3.0
Subtracting 57 from 64 leaves us with 7.
Append the next digit (1) from the dividend to 7 and continue with: 71 / 19

Let's proceed to step 3:
19 goes into 71 3 times with a remainder of 14.
Put 3 as the next digit of the answer. 
Result so far: 33.0
Deduct 57 from 71 and we're left with 14.
Bring next digit (5) of the dividend behind the 14 and repeat the process: 145 / 19

Let's proceed to step 4:
19 goes into 145 7 times with a remainder of 12.
The next digit of our result is 7. 
Result so far: 337.0
If we subtract 133 from 145, we get 12.
Include the next digit (0) from the dividend after 12, then repeat: 120 / 19

Going ahead to step 5:
19 can be fit into 120 6 times, resulting in a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 3376.0
If we take 114 away from 120, we end up with 6.
Append the next digit (8) from the dividend to 6 and continue with: 68 / 19

Going ahead to step 6:
When dividing 68 by 19, we get 3 with a remainder of 11.
Put 3 as the next digit of the answer. 
Result so far: 33763.0
The remainder is 11 after subtracting 57 from 68.
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 7:
110 divided by 19 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 33763.5
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 8:
19 goes into 150 7 times with a remainder of 17.
The number 7 becomes the next digit in our result. 
Result so far: 33763.57
If we subtract 133 from 150, we 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 9:
The number 19 fits into 170 8 times, leaving a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 33763.578
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.

Going ahead to step 10:
If we divide 180 by 19, we get 9 and a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 33763.5789
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 11:
When dividing 90 by 19, we get 4 with a remainder of 14.
Record the quotient 4 as the next digit in the result. 
Result so far: 33763.57894
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.

Let's proceed to step 12:
When dividing 140 by 19, we get 7 with a remainder of 7.
The next digit of our result is 7. 
Result so far: 33763.578947
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.

Let's proceed to step 13:
19 can be fit into 70 3 times, resulting in a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 33763.5789473
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.

Going ahead to step 14:
130 divided by 19 is 6 with a remainder of 16.
The next digit of our result is 6. 
Result so far: 33763.57894736
If we take 114 away from 130, we end up 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.

After the division, we end up with 33763.57894736 and a remainder of 1.6e-08.