We're dividing 53398666 by 516 
The aim is to understand the frequency of 516 in 53398666.

Advancing to step 1:
The number 516 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 516

Step 2:
53 divided by 516 is 0 with a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Append the next digit (3) from the dividend to 53 and continue with: 533 / 516

Let's proceed to step 3:
516 goes into 533 1 times with a remainder of 17.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 516 from 533 leaves us with 17.
Take the next digit (9) from the dividend and append it to 17, then repeat: 179 / 516

Step 4:
179 divided by 516 is 0 with a remainder of 179.
The next digit of our result is 0. 
Result so far: 10.0
The remainder is 179 after subtracting 0 from 179.
Bring next digit (8) of the dividend behind the 179 and repeat the process: 1798 / 516

Advancing to step 5:
1798 divided by 516 is 3 with a remainder of 250.
Write down 3 as next digit of the result. 
Result so far: 103.0
Subtracting 1548 from 1798 leaves us with 250.
Fetch the next digit (6) from the dividend, attach it to 250 and continue: 2506 / 516

Let's proceed to step 6:
If we divide 2506 by 516, we get 4 and a remainder of 442.
The number 4 becomes the next digit in our result. 
Result so far: 1034.0
The remainder is 442 after subtracting 2064 from 2506.
Take the next digit (6) from the dividend and append it to 442, then repeat: 4426 / 516

Moving on to step 7:
If we divide 4426 by 516, we get 8 and a remainder of 298.
The next digit of our result is 8. 
Result so far: 10348.0
The remainder is 298 after subtracting 4128 from 4426.
Include the next digit (6) from the dividend after 298, then repeat: 2986 / 516

Let's proceed to step 8:
516 goes into 2986 5 times with a remainder of 406.
Put 5 as the next digit of the answer. 
Result so far: 103485.0
If we subtract 2580 from 2986, we get 406.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4060, and continue the process.

Advancing to step 9:
When dividing 4060 by 516, we get 7 with a remainder of 448.
Put 7 as the next digit of the answer. 
Result so far: 103485.7
The remainder is 448 after subtracting 3612 from 4060.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Advancing to step 10:
516 can be fit into 4480 8 times, resulting in a remainder of 352.
Put 8 as the next digit of the answer. 
Result so far: 103485.78
The remainder is 352 after subtracting 4128 from 4480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3520, and continue the process.

On to step 11:
516 can be fit into 3520 6 times, resulting in a remainder of 424.
Use 6 as the next digit of our solution. 
Result so far: 103485.786
The remainder is 424 after subtracting 3096 from 3520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4240, and continue the process.

Going ahead to step 12:
The number 516 fits into 4240 8 times, leaving a remainder of 112.
Use 8 as the next digit of our solution. 
Result so far: 103485.7868
If we subtract 4128 from 4240, we get 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

Step 13:
1120 divided by 516 is 2 with a remainder of 88.
Record the quotient 2 as the next digit in the result. 
Result so far: 103485.78682
If we take 1032 away from 1120, we end up 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.

On to step 14:
When dividing 880 by 516, we get 1 with a remainder of 364.
Use 1 as the next digit of our solution. 
Result so far: 103485.786821
If we subtract 516 from 880, we get 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 15:
516 goes into 3640 7 times with a remainder of 28.
Record the quotient 7 as the next digit in the result. 
Result so far: 103485.7868217
The remainder is 28 after subtracting 3612 from 3640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Advancing to step 16:
If we divide 280 by 516, we get 0 and a remainder of 280.
Record the quotient 0 as the next digit in the result. 
Result so far: 103485.7868217
Deduct 0 from 280 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

In conclusion, the division gives 103485.7868217 with a balance of 2.8e-07.