We look at the division of 81935525 by 519 
The aim is to understand the frequency of 519 in 81935525.

Step 1:
519 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 519

Moving on to step 2:
519 goes into 81 0 times with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 81 and we're left with 81.
Bring next digit (9) of the dividend behind the 81 and repeat the process: 819 / 519

Moving on to step 3:
If we divide 819 by 519, we get 1 and a remainder of 300.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 519 away from 819, we end up with 300.
Grab the next digit (3) from the dividend, add it to 300, then carry on: 3003 / 519

Going ahead to step 4:
When dividing 3003 by 519, we get 5 with a remainder of 408.
Use 5 as the next digit of our solution. 
Result so far: 15.0
Deduct 2595 from 3003 and we're left with 408.
Fetch the next digit (5) from the dividend, attach it to 408 and continue: 4085 / 519

Let's proceed to step 5:
If we divide 4085 by 519, we get 7 and a remainder of 452.
The number 7 becomes the next digit in our result. 
Result so far: 157.0
If we take 3633 away from 4085, we end up with 452.
Bring next digit (5) of the dividend behind the 452 and repeat the process: 4525 / 519

Going ahead to step 6:
4525 divided by 519 is 8 with a remainder of 373.
Put 8 as the next digit of the answer. 
Result so far: 1578.0
Subtracting 4152 from 4525 leaves us with 373.
Bring next digit (2) of the dividend behind the 373 and repeat the process: 3732 / 519

Let's proceed to step 7:
3732 divided by 519 is 7 with a remainder of 99.
Put 7 as the next digit of the answer. 
Result so far: 15787.0
Subtracting 3633 from 3732 leaves us with 99.
Include the next digit (5) from the dividend after 99, then repeat: 995 / 519

On to step 8:
The number 519 fits into 995 1 times, leaving a remainder of 476.
The next digit of our result is 1. 
Result so far: 157871.0
Subtracting 519 from 995 leaves us with 476.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4760, and continue the process.

Step 9:
If we divide 4760 by 519, we get 9 and a remainder of 89.
The number 9 becomes the next digit in our result. 
Result so far: 157871.9
If we take 4671 away from 4760, we end up with 89.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

Moving on to step 10:
The number 519 fits into 890 1 times, leaving a remainder of 371.
Put 1 as the next digit of the answer. 
Result so far: 157871.91
Subtract 519 from 890 to get 371.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3710, and continue the process.

Moving on to step 11:
The number 519 fits into 3710 7 times, leaving a remainder of 77.
Write down 7 as next digit of the result. 
Result so far: 157871.917
If we take 3633 away from 3710, we end up with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 12:
519 goes into 770 1 times with a remainder of 251.
Use 1 as the next digit of our solution. 
Result so far: 157871.9171
If we subtract 519 from 770, we get 251.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2510, and continue the process.

Advancing to step 13:
When dividing 2510 by 519, we get 4 with a remainder of 434.
Put 4 as the next digit of the answer. 
Result so far: 157871.91714
If we subtract 2076 from 2510, we get 434.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4340, and continue the process.

Going ahead to step 14:
519 goes into 4340 8 times with a remainder of 188.
The next digit of our result is 8. 
Result so far: 157871.917148
If we subtract 4152 from 4340, we get 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

Advancing to step 15:
The number 519 fits into 1880 3 times, leaving a remainder of 323.
Use 3 as the next digit of our solution. 
Result so far: 157871.9171483
If we take 1557 away from 1880, we end up with 323.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3230, and continue the process.

Going ahead to step 16:
519 goes into 3230 6 times with a remainder of 116.
Put 6 as the next digit of the answer. 
Result so far: 157871.91714836
Subtract 3114 from 3230 to get 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

The quotient of the division is 157871.91714836, and the remainder is 1.16e-07.