We're dividing 75118609 by 518 
The aim is to understand the frequency of 518 in 75118609.

Let's proceed to step 1:
The number 518 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Take the next digit (5) from the dividend and append it to 7, then repeat: 75 / 518

On to step 2:
75 divided by 518 is 0 with a remainder of 75.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 75, we get 75.
Fetch the next digit (1) from the dividend, attach it to 75 and continue: 751 / 518

Step 3:
751 divided by 518 is 1 with a remainder of 233.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 233 after subtracting 518 from 751.
Include the next digit (1) from the dividend after 233, then repeat: 2331 / 518

Step 4:
The number 518 fits into 2331 4 times, leaving a remainder of 259.
Use 4 as the next digit of our solution. 
Result so far: 14.0
If we subtract 2072 from 2331, we get 259.
Bring next digit (8) of the dividend behind the 259 and repeat the process: 2598 / 518

Going ahead to step 5:
518 goes into 2598 5 times with a remainder of 8.
Put 5 as the next digit of the answer. 
Result so far: 145.0
The remainder is 8 after subtracting 2590 from 2598.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 518

Step 6:
518 goes into 86 0 times with a remainder of 86.
Use 0 as the next digit of our solution. 
Result so far: 1450.0
If we subtract 0 from 86, we get 86.
Fetch the next digit (0) from the dividend, attach it to 86 and continue: 860 / 518

Going ahead to step 7:
When dividing 860 by 518, we get 1 with a remainder of 342.
The next digit of our result is 1. 
Result so far: 14501.0
If we take 518 away from 860, we end up with 342.
Bring next digit (9) of the dividend behind the 342 and repeat the process: 3429 / 518

On to step 8:
When dividing 3429 by 518, we get 6 with a remainder of 321.
Use 6 as the next digit of our solution. 
Result so far: 145016.0
Deduct 3108 from 3429 and we're left with 321.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3210, and continue the process.

Moving on to step 9:
518 can be fit into 3210 6 times, resulting in a remainder of 102.
Record the quotient 6 as the next digit in the result. 
Result so far: 145016.6
If we subtract 3108 from 3210, we get 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

Moving on to step 10:
518 can be fit into 1020 1 times, resulting in a remainder of 502.
The next digit of our result is 1. 
Result so far: 145016.61
Subtract 518 from 1020 to get 502.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5020, and continue the process.

Moving on to step 11:
518 goes into 5020 9 times with a remainder of 358.
Use 9 as the next digit of our solution. 
Result so far: 145016.619
If we take 4662 away from 5020, we end up with 358.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3580, and continue the process.

Step 12:
518 goes into 3580 6 times with a remainder of 472.
Put 6 as the next digit of the answer. 
Result so far: 145016.6196
If we subtract 3108 from 3580, we get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

On to step 13:
4720 divided by 518 is 9 with a remainder of 58.
Put 9 as the next digit of the answer. 
Result so far: 145016.61969
If we subtract 4662 from 4720, we get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Step 14:
If we divide 580 by 518, we get 1 and a remainder of 62.
The number 1 becomes the next digit in our result. 
Result so far: 145016.619691
Deduct 518 from 580 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

On to step 15:
518 goes into 620 1 times with a remainder of 102.
Put 1 as the next digit of the answer. 
Result so far: 145016.6196911
If we take 518 away from 620, we end up with 102.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1020, and continue the process.

The final outcome is 145016.6196911, with a leftover of 1.02e-06.