57261514 divided by 519 
The aim is to understand the frequency of 519 in 57261514.

On to step 1:
When dividing 5 by 519, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Grab the next digit (7) from the dividend, add it to 5, then carry on: 57 / 519

Step 2:
519 goes into 57 0 times with a remainder of 57.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 57 to get 57.
Fetch the next digit (2) from the dividend, attach it to 57 and continue: 572 / 519

Advancing to step 3:
572 divided by 519 is 1 with a remainder of 53.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 519 from 572, we get 53.
Bring next digit (6) of the dividend behind the 53 and repeat the process: 536 / 519

Advancing to step 4:
536 divided by 519 is 1 with a remainder of 17.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
If we take 519 away from 536, we end up with 17.
Take the next digit (1) from the dividend and append it to 17, then repeat: 171 / 519

Going ahead to step 5:
519 goes into 171 0 times with a remainder of 171.
Write down 0 as next digit of the result. 
Result so far: 110.0
Subtracting 0 from 171 leaves us with 171.
Append the next digit (5) from the dividend to 171 and continue with: 1715 / 519

Advancing to step 6:
The number 519 fits into 1715 3 times, leaving a remainder of 158.
Use 3 as the next digit of our solution. 
Result so far: 1103.0
Deduct 1557 from 1715 and we're left with 158.
Take the next digit (1) from the dividend and append it to 158, then repeat: 1581 / 519

Let's proceed to step 7:
When dividing 1581 by 519, we get 3 with a remainder of 24.
Write down 3 as next digit of the result. 
Result so far: 11033.0
Subtracting 1557 from 1581 leaves us with 24.
Bring next digit (4) of the dividend behind the 24 and repeat the process: 244 / 519

On to step 8:
When dividing 244 by 519, we get 0 with a remainder of 244.
The next digit of our result is 0. 
Result so far: 110330.0
If we take 0 away from 244, we end up with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Step 9:
If we divide 2440 by 519, we get 4 and a remainder of 364.
Write down 4 as next digit of the result. 
Result so far: 110330.4
If we subtract 2076 from 2440, we get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

Moving on to step 10:
519 can be fit into 3640 7 times, resulting in a remainder of 7.
Put 7 as the next digit of the answer. 
Result so far: 110330.47
If we take 3633 away from 3640, we end up 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.

Step 11:
519 goes into 70 0 times with a remainder of 70.
Put 0 as the next digit of the answer. 
Result so far: 110330.47
Subtracting 0 from 70 leaves us with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Going ahead to step 12:
The number 519 fits into 700 1 times, leaving a remainder of 181.
The number 1 becomes the next digit in our result. 
Result so far: 110330.4701
Subtracting 519 from 700 leaves us with 181.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1810, and continue the process.

On to step 13:
The number 519 fits into 1810 3 times, leaving a remainder of 253.
Write down 3 as next digit of the result. 
Result so far: 110330.47013
Subtract 1557 from 1810 to get 253.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2530, and continue the process.

Moving on to step 14:
The number 519 fits into 2530 4 times, leaving a remainder of 454.
The number 4 becomes the next digit in our result. 
Result so far: 110330.470134
Subtract 2076 from 2530 to get 454.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4540, and continue the process.

Moving on to step 15:
519 goes into 4540 8 times with a remainder of 388.
Record the quotient 8 as the next digit in the result. 
Result so far: 110330.4701348
Deduct 4152 from 4540 and we're left with 388.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Moving on to step 16:
519 goes into 3880 7 times with a remainder of 247.
The number 7 becomes the next digit in our result. 
Result so far: 110330.47013487
Deduct 3633 from 3880 and we're left with 247.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2470, and continue the process.

The final outcome is 110330.47013487, with a leftover of 2.47e-07.