50660509 ÷ 516 
The aim is to understand the frequency of 516 in 50660509.

On to step 1:
If we divide 5 by 516, we get 0 and a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Fetch the next digit (0) from the dividend, attach it to 5 and continue: 50 / 516

Let's proceed to step 2:
If we divide 50 by 516, we get 0 and a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 50, we get 50.
Fetch the next digit (6) from the dividend, attach it to 50 and continue: 506 / 516

Going ahead to step 3:
When dividing 506 by 516, we get 0 with a remainder of 506.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 506 leaves us with 506.
Bring next digit (6) of the dividend behind the 506 and repeat the process: 5066 / 516

Advancing to step 4:
The number 516 fits into 5066 9 times, leaving a remainder of 422.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
Subtract 4644 from 5066 to get 422.
Grab the next digit (0) from the dividend, add it to 422, then carry on: 4220 / 516

On to step 5:
4220 divided by 516 is 8 with a remainder of 92.
The next digit of our result is 8. 
Result so far: 98.0
The remainder is 92 after subtracting 4128 from 4220.
Grab the next digit (5) from the dividend, add it to 92, then carry on: 925 / 516

Moving on to step 6:
516 can be fit into 925 1 times, resulting in a remainder of 409.
Use 1 as the next digit of our solution. 
Result so far: 981.0
If we take 516 away from 925, we end up with 409.
Take the next digit (0) from the dividend and append it to 409, then repeat: 4090 / 516

Step 7:
If we divide 4090 by 516, we get 7 and a remainder of 478.
The number 7 becomes the next digit in our result. 
Result so far: 9817.0
Deduct 3612 from 4090 and we're left with 478.
Take the next digit (9) from the dividend and append it to 478, then repeat: 4789 / 516

On to step 8:
516 goes into 4789 9 times with a remainder of 145.
Put 9 as the next digit of the answer. 
Result so far: 98179.0
Subtract 4644 from 4789 to get 145.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1450, and continue the process.

Going ahead to step 9:
When dividing 1450 by 516, we get 2 with a remainder of 418.
Use 2 as the next digit of our solution. 
Result so far: 98179.2
Deduct 1032 from 1450 and we're left with 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Going ahead to step 10:
If we divide 4180 by 516, we get 8 and a remainder of 52.
Put 8 as the next digit of the answer. 
Result so far: 98179.28
Subtracting 4128 from 4180 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 11:
516 goes into 520 1 times with a remainder of 4.
The next digit of our result is 1. 
Result so far: 98179.281
Subtract 516 from 520 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 12:
40 divided by 516 is 0 with a remainder of 40.
The next digit of our result is 0. 
Result so far: 98179.281
If we take 0 away from 40, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 13:
400 divided by 516 is 0 with a remainder of 400.
The number 0 becomes the next digit in our result. 
Result so far: 98179.281
Subtracting 0 from 400 leaves us with 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4000, and continue the process.

The final result is 98179.281 with a remainder of 0.0004.