We look at the division of 66425679 by 516 
The aim is to understand the frequency of 516 in 66425679.

Going ahead to step 1:
The number 516 fits into 6 0 times, leaving a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 516

Step 2:
66 divided by 516 is 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 66 and we're left with 66.
Include the next digit (4) from the dividend after 66, then repeat: 664 / 516

Step 3:
If we divide 664 by 516, we get 1 and a remainder of 148.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 516 from 664 to get 148.
Take the next digit (2) from the dividend and append it to 148, then repeat: 1482 / 516

On to step 4:
The number 516 fits into 1482 2 times, leaving a remainder of 450.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
Deduct 1032 from 1482 and we're left with 450.
Grab the next digit (5) from the dividend, add it to 450, then carry on: 4505 / 516

Moving on to step 5:
The number 516 fits into 4505 8 times, leaving a remainder of 377.
Write down 8 as next digit of the result. 
Result so far: 128.0
If we subtract 4128 from 4505, we get 377.
Grab the next digit (6) from the dividend, add it to 377, then carry on: 3776 / 516

Going ahead to step 6:
3776 divided by 516 is 7 with a remainder of 164.
Use 7 as the next digit of our solution. 
Result so far: 1287.0
Subtract 3612 from 3776 to get 164.
Bring next digit (7) of the dividend behind the 164 and repeat the process: 1647 / 516

On to step 7:
516 goes into 1647 3 times with a remainder of 99.
Record the quotient 3 as the next digit in the result. 
Result so far: 12873.0
The remainder is 99 after subtracting 1548 from 1647.
Bring next digit (9) of the dividend behind the 99 and repeat the process: 999 / 516

Step 8:
The number 516 fits into 999 1 times, leaving a remainder of 483.
Put 1 as the next digit of the answer. 
Result so far: 128731.0
Subtracting 516 from 999 leaves us with 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

Going ahead to step 9:
516 goes into 4830 9 times with a remainder of 186.
Use 9 as the next digit of our solution. 
Result so far: 128731.9
Subtracting 4644 from 4830 leaves us with 186.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Step 10:
1860 divided by 516 is 3 with a remainder of 312.
Put 3 as the next digit of the answer. 
Result so far: 128731.93
Subtract 1548 from 1860 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 11:
The number 516 fits into 3120 6 times, leaving a remainder of 24.
Use 6 as the next digit of our solution. 
Result so far: 128731.936
The remainder is 24 after subtracting 3096 from 3120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 12:
516 can be fit into 240 0 times, resulting in a remainder of 240.
Use 0 as the next digit of our solution. 
Result so far: 128731.936
Subtracting 0 from 240 leaves us with 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

Advancing to step 13:
2400 divided by 516 is 4 with a remainder of 336.
The next digit of our result is 4. 
Result so far: 128731.93604
If we subtract 2064 from 2400, we get 336.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3360, and continue the process.

On to step 14:
The number 516 fits into 3360 6 times, leaving a remainder of 264.
Use 6 as the next digit of our solution. 
Result so far: 128731.936046
Subtracting 3096 from 3360 leaves us with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

On to step 15:
2640 divided by 516 is 5 with a remainder of 60.
The number 5 becomes the next digit in our result. 
Result so far: 128731.9360465
If we take 2580 away from 2640, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 16:
516 can be fit into 600 1 times, resulting in a remainder of 84.
The next digit of our result is 1. 
Result so far: 128731.93604651
Subtract 516 from 600 to get 84.
Since there are no more digits in the dividend, we add a zero to the remainder making it 840, and continue the process.

Our division results in 128731.93604651 with a remaining 8.4e-08.