91044771 ÷ 519 
The aim is to understand the frequency of 519 in 91044771.

Step 1:
When dividing 9 by 519, we get 0 with a remainder of 9.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 9 to get 9.
Include the next digit (1) from the dividend after 9, then repeat: 91 / 519

Advancing to step 2:
The number 519 fits into 91 0 times, leaving a remainder of 91.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Take the next digit (0) from the dividend and append it to 91, then repeat: 910 / 519

On to step 3:
When dividing 910 by 519, we get 1 with a remainder of 391.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 519 from 910 leaves us with 391.
Append the next digit (4) from the dividend to 391 and continue with: 3914 / 519

Step 4:
3914 divided by 519 is 7 with a remainder of 281.
Record the quotient 7 as the next digit in the result. 
Result so far: 17.0
The remainder is 281 after subtracting 3633 from 3914.
Append the next digit (4) from the dividend to 281 and continue with: 2814 / 519

Moving on to step 5:
519 can be fit into 2814 5 times, resulting in a remainder of 219.
Put 5 as the next digit of the answer. 
Result so far: 175.0
The remainder is 219 after subtracting 2595 from 2814.
Grab the next digit (7) from the dividend, add it to 219, then carry on: 2197 / 519

Advancing to step 6:
When dividing 2197 by 519, we get 4 with a remainder of 121.
Record the quotient 4 as the next digit in the result. 
Result so far: 1754.0
If we take 2076 away from 2197, we end up with 121.
Grab the next digit (7) from the dividend, add it to 121, then carry on: 1217 / 519

Let's proceed to step 7:
If we divide 1217 by 519, we get 2 and a remainder of 179.
The number 2 becomes the next digit in our result. 
Result so far: 17542.0
Subtracting 1038 from 1217 leaves us with 179.
Grab the next digit (1) from the dividend, add it to 179, then carry on: 1791 / 519

Going ahead to step 8:
1791 divided by 519 is 3 with a remainder of 234.
The number 3 becomes the next digit in our result. 
Result so far: 175423.0
Subtract 1557 from 1791 to get 234.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2340, and continue the process.

Let's proceed to step 9:
The number 519 fits into 2340 4 times, leaving a remainder of 264.
Use 4 as the next digit of our solution. 
Result so far: 175423.4
The remainder is 264 after subtracting 2076 from 2340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Step 10:
519 goes into 2640 5 times with a remainder of 45.
Put 5 as the next digit of the answer. 
Result so far: 175423.45
If we subtract 2595 from 2640, we get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 11:
519 goes into 450 0 times with a remainder of 450.
Record the quotient 0 as the next digit in the result. 
Result so far: 175423.45
Deduct 0 from 450 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

On to step 12:
519 can be fit into 4500 8 times, resulting in a remainder of 348.
Write down 8 as next digit of the result. 
Result so far: 175423.4508
Deduct 4152 from 4500 and we're left with 348.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3480, and continue the process.

Advancing to step 13:
If we divide 3480 by 519, we get 6 and a remainder of 366.
Put 6 as the next digit of the answer. 
Result so far: 175423.45086
Deduct 3114 from 3480 and we're left with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Advancing to step 14:
If we divide 3660 by 519, we get 7 and a remainder of 27.
The next digit of our result is 7. 
Result so far: 175423.450867
Deduct 3633 from 3660 and we're left with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 15:
If we divide 270 by 519, we get 0 and a remainder of 270.
The number 0 becomes the next digit in our result. 
Result so far: 175423.450867
If we subtract 0 from 270, we get 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Advancing to step 16:
If we divide 2700 by 519, we get 5 and a remainder of 105.
Put 5 as the next digit of the answer. 
Result so far: 175423.45086705
If we subtract 2595 from 2700, we get 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

Our division results in 175423.45086705 with a remaining 1.05e-07.