We look at the division of 80025539 by 519 
The aim is to understand the frequency of 519 in 80025539.

Moving on to step 1:
519 goes into 8 0 times with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 519

On to step 2:
80 divided by 519 is 0 with a remainder of 80.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 80, we end up with 80.
Take the next digit (0) from the dividend and append it to 80, then repeat: 800 / 519

Going ahead to step 3:
The number 519 fits into 800 1 times, leaving a remainder of 281.
Put 1 as the next digit of the answer. 
Result so far: 1.0
The remainder is 281 after subtracting 519 from 800.
Fetch the next digit (2) from the dividend, attach it to 281 and continue: 2812 / 519

On to step 4:
If we divide 2812 by 519, we get 5 and a remainder of 217.
Put 5 as the next digit of the answer. 
Result so far: 15.0
If we subtract 2595 from 2812, we get 217.
Append the next digit (5) from the dividend to 217 and continue with: 2175 / 519

Step 5:
519 can be fit into 2175 4 times, resulting in a remainder of 99.
The next digit of our result is 4. 
Result so far: 154.0
Deduct 2076 from 2175 and we're left with 99.
Take the next digit (5) from the dividend and append it to 99, then repeat: 995 / 519

Moving on to step 6:
The number 519 fits into 995 1 times, leaving a remainder of 476.
The next digit of our result is 1. 
Result so far: 1541.0
If we take 519 away from 995, we end up with 476.
Grab the next digit (3) from the dividend, add it to 476, then carry on: 4763 / 519

Step 7:
4763 divided by 519 is 9 with a remainder of 92.
Put 9 as the next digit of the answer. 
Result so far: 15419.0
The remainder is 92 after subtracting 4671 from 4763.
Grab the next digit (9) from the dividend, add it to 92, then carry on: 929 / 519

On to step 8:
519 goes into 929 1 times with a remainder of 410.
The next digit of our result is 1. 
Result so far: 154191.0
The remainder is 410 after subtracting 519 from 929.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4100, and continue the process.

Moving on to step 9:
The number 519 fits into 4100 7 times, leaving a remainder of 467.
Write down 7 as next digit of the result. 
Result so far: 154191.7
Deduct 3633 from 4100 and we're left with 467.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4670, and continue the process.

Let's proceed to step 10:
The number 519 fits into 4670 8 times, leaving a remainder of 518.
The next digit of our result is 8. 
Result so far: 154191.78
Subtracting 4152 from 4670 leaves us with 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

Let's proceed to step 11:
When dividing 5180 by 519, we get 9 with a remainder of 509.
Use 9 as the next digit of our solution. 
Result so far: 154191.789
Deduct 4671 from 5180 and we're left with 509.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5090, and continue the process.

Going ahead to step 12:
5090 divided by 519 is 9 with a remainder of 419.
Put 9 as the next digit of the answer. 
Result so far: 154191.7899
Deduct 4671 from 5090 and we're left with 419.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4190, and continue the process.

The final outcome is 154191.7899, with a leftover of 0.00419.