We're dividing 72905480 by 518 
The aim is to understand the frequency of 518 in 72905480.

On to step 1:
If we divide 7 by 518, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 7 leaves us with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 518

Advancing to step 2:
72 divided by 518 is 0 with a remainder of 72.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 72 and we're left with 72.
Take the next digit (9) from the dividend and append it to 72, then repeat: 729 / 518

On to step 3:
518 goes into 729 1 times with a remainder of 211.
The next digit of our result is 1. 
Result so far: 1.0
If we subtract 518 from 729, we get 211.
Grab the next digit (0) from the dividend, add it to 211, then carry on: 2110 / 518

Moving on to step 4:
518 can be fit into 2110 4 times, resulting in a remainder of 38.
Use 4 as the next digit of our solution. 
Result so far: 14.0
Subtracting 2072 from 2110 leaves us with 38.
Fetch the next digit (5) from the dividend, attach it to 38 and continue: 385 / 518

Let's proceed to step 5:
385 divided by 518 is 0 with a remainder of 385.
Write down 0 as next digit of the result. 
Result so far: 140.0
If we take 0 away from 385, we end up with 385.
Include the next digit (4) from the dividend after 385, then repeat: 3854 / 518

Moving on to step 6:
The number 518 fits into 3854 7 times, leaving a remainder of 228.
The number 7 becomes the next digit in our result. 
Result so far: 1407.0
If we take 3626 away from 3854, we end up with 228.
Append the next digit (8) from the dividend to 228 and continue with: 2288 / 518

Going ahead to step 7:
2288 divided by 518 is 4 with a remainder of 216.
Record the quotient 4 as the next digit in the result. 
Result so far: 14074.0
Subtract 2072 from 2288 to get 216.
Include the next digit (0) from the dividend after 216, then repeat: 2160 / 518

Let's proceed to step 8:
518 can be fit into 2160 4 times, resulting in a remainder of 88.
Write down 4 as next digit of the result. 
Result so far: 140744.0
Deduct 2072 from 2160 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Step 9:
If we divide 880 by 518, we get 1 and a remainder of 362.
Use 1 as the next digit of our solution. 
Result so far: 140744.1
If we take 518 away from 880, we end up with 362.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3620, and continue the process.

Moving on to step 10:
518 goes into 3620 6 times with a remainder of 512.
Record the quotient 6 as the next digit in the result. 
Result so far: 140744.16
If we subtract 3108 from 3620, we get 512.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5120, and continue the process.

Going ahead to step 11:
The number 518 fits into 5120 9 times, leaving a remainder of 458.
The next digit of our result is 9. 
Result so far: 140744.169
Deduct 4662 from 5120 and we're left with 458.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4580, and continue the process.

Moving on to step 12:
When dividing 4580 by 518, we get 8 with a remainder of 436.
Use 8 as the next digit of our solution. 
Result so far: 140744.1698
Subtracting 4144 from 4580 leaves us with 436.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4360, and continue the process.

Going ahead to step 13:
The number 518 fits into 4360 8 times, leaving a remainder of 216.
Use 8 as the next digit of our solution. 
Result so far: 140744.16988
If we subtract 4144 from 4360, we get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

The final outcome is 140744.16988, with a leftover of 0.000216.