Let's divide 75521372 by 19
The aim is to understand the frequency of 19 in 75521372.

Step 1:
When dividing 7 by 19, we get 0 with a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Fetch the next digit (5) from the dividend, attach it to 7 and continue: 75 / 19

Moving on to step 2:
75 divided by 19 is 3 with a remainder of 18.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtract 57 from 75 to get 18.
Fetch the next digit (5) from the dividend, attach it to 18 and continue: 185 / 19

Let's proceed to step 3:
The number 19 fits into 185 9 times, leaving a remainder of 14.
Put 9 as the next digit of the answer. 
Result so far: 39.0
The remainder is 14 after subtracting 171 from 185.
Grab the next digit (2) from the dividend, add it to 14, then carry on: 142 / 19

Moving on to step 4:
19 goes into 142 7 times with a remainder of 9.
The number 7 becomes the next digit in our result. 
Result so far: 397.0
If we take 133 away from 142, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 19

Let's proceed to step 5:
19 can be fit into 91 4 times, resulting in a remainder of 15.
Put 4 as the next digit of the answer. 
Result so far: 3974.0
Subtract 76 from 91 to get 15.
Grab the next digit (3) from the dividend, add it to 15, then carry on: 153 / 19

Let's proceed to step 6:
19 can be fit into 153 8 times, resulting in a remainder of 1.
The number 8 becomes the next digit in our result. 
Result so far: 39748.0
If we subtract 152 from 153, we get 1.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 19

Going ahead to step 7:
17 divided by 19 is 0 with a remainder of 17.
The number 0 becomes the next digit in our result. 
Result so far: 397480.0
If we subtract 0 from 17, we get 17.
Include the next digit (2) from the dividend after 17, then repeat: 172 / 19

Step 8:
The number 19 fits into 172 9 times, leaving a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 3974809.0
The remainder is 1 after subtracting 171 from 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
The number 19 fits into 10 0 times, leaving a remainder of 10.
Put 0 as the next digit of the answer. 
Result so far: 3974809.0
If we take 0 away from 10, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 10:
19 goes into 100 5 times with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 3974809.05
If we subtract 95 from 100, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 11:
The number 19 fits into 50 2 times, leaving a remainder of 12.
The next digit of our result is 2. 
Result so far: 3974809.052
If we subtract 38 from 50, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 12:
19 goes into 120 6 times with a remainder of 6.
Record the quotient 6 as the next digit in the result. 
Result so far: 3974809.0526
If we take 114 away from 120, 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.

Step 13:
When dividing 60 by 19, we get 3 with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 3974809.05263
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.

On to step 14:
The number 19 fits into 30 1 times, leaving a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 3974809.052631
If we subtract 19 from 30, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Advancing to step 15:
19 can be fit into 110 5 times, resulting in a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 3974809.0526315
Subtract 95 from 110 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.

Advancing to step 16:
150 divided by 19 is 7 with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 3974809.05263157
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.

The final result is 3974809.05263157 with a remainder of 1.7e-08.