53052452 divided by 666 
The aim is to understand the frequency of 666 in 53052452.

On to step 1:
666 can be fit into 5 0 times, resulting in a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 5 to get 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 666

Advancing to step 2:
666 goes into 53 0 times with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Take the next digit (0) from the dividend and append it to 53, then repeat: 530 / 666

Going ahead to step 3:
666 goes into 530 0 times with a remainder of 530.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 530, we get 530.
Fetch the next digit (5) from the dividend, attach it to 530 and continue: 5305 / 666

Step 4:
When dividing 5305 by 666, we get 7 with a remainder of 643.
Use 7 as the next digit of our solution. 
Result so far: 7.0
The remainder is 643 after subtracting 4662 from 5305.
Grab the next digit (2) from the dividend, add it to 643, then carry on: 6432 / 666

On to step 5:
If we divide 6432 by 666, we get 9 and a remainder of 438.
The next digit of our result is 9. 
Result so far: 79.0
The remainder is 438 after subtracting 5994 from 6432.
Append the next digit (4) from the dividend to 438 and continue with: 4384 / 666

Going ahead to step 6:
4384 divided by 666 is 6 with a remainder of 388.
Put 6 as the next digit of the answer. 
Result so far: 796.0
The remainder is 388 after subtracting 3996 from 4384.
Append the next digit (5) from the dividend to 388 and continue with: 3885 / 666

Going ahead to step 7:
The number 666 fits into 3885 5 times, leaving a remainder of 555.
Record the quotient 5 as the next digit in the result. 
Result so far: 7965.0
If we subtract 3330 from 3885, we get 555.
Take the next digit (2) from the dividend and append it to 555, then repeat: 5552 / 666

Moving on to step 8:
The number 666 fits into 5552 8 times, leaving a remainder of 224.
The next digit of our result is 8. 
Result so far: 79658.0
The remainder is 224 after subtracting 5328 from 5552.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2240, and continue the process.

Step 9:
666 can be fit into 2240 3 times, resulting in a remainder of 242.
The next digit of our result is 3. 
Result so far: 79658.3
If we take 1998 away from 2240, we end up with 242.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2420, and continue the process.

Let's proceed to step 10:
If we divide 2420 by 666, we get 3 and a remainder of 422.
Put 3 as the next digit of the answer. 
Result so far: 79658.33
The remainder is 422 after subtracting 1998 from 2420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4220, and continue the process.

The final result is 79658.33 with a remainder of 0.422.