519419 ÷ 86 
The aim is to understand the frequency of 86 in 519419.

Advancing to step 1:
86 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 86

Step 2:
When dividing 51 by 86, we get 0 with a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Take the next digit (9) from the dividend and append it to 51, then repeat: 519 / 86

Moving on to step 3:
If we divide 519 by 86, we get 6 and a remainder of 3.
Write down 6 as next digit of the result. 
Result so far: 6.0
The remainder is 3 after subtracting 516 from 519.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 86

Moving on to step 4:
The number 86 fits into 34 0 times, leaving a remainder of 34.
Put 0 as the next digit of the answer. 
Result so far: 60.0
Subtract 0 from 34 to get 34.
Append the next digit (1) from the dividend to 34 and continue with: 341 / 86

On to step 5:
86 can be fit into 341 3 times, resulting in a remainder of 83.
Put 3 as the next digit of the answer. 
Result so far: 603.0
If we take 258 away from 341, we end up with 83.
Append the next digit (9) from the dividend to 83 and continue with: 839 / 86

Going ahead to step 6:
86 can be fit into 839 9 times, resulting in a remainder of 65.
The number 9 becomes the next digit in our result. 
Result so far: 6039.0
Subtract 774 from 839 to get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

Step 7:
When dividing 650 by 86, we get 7 with a remainder of 48.
Use 7 as the next digit of our solution. 
Result so far: 6039.7
If we take 602 away from 650, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Going ahead to step 8:
86 can be fit into 480 5 times, resulting in a remainder of 50.
The next digit of our result is 5. 
Result so far: 6039.75
If we subtract 430 from 480, we get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 9:
500 divided by 86 is 5 with a remainder of 70.
The next digit of our result is 5. 
Result so far: 6039.755
Subtracting 430 from 500 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.

After the division, we end up with 6039.755 and a remainder of 0.007.