We're dividing 51714757 by 669 
The aim is to understand the frequency of 669 in 51714757.

Let's proceed to step 1:
When dividing 5 by 669, we get 0 with 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.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 669

Moving on to step 2:
The number 669 fits into 51 0 times, leaving a remainder of 51.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 51 leaves us with 51.
Bring next digit (7) of the dividend behind the 51 and repeat the process: 517 / 669

Advancing to step 3:
When dividing 517 by 669, we get 0 with a remainder of 517.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 517 leaves us with 517.
Grab the next digit (1) from the dividend, add it to 517, then carry on: 5171 / 669

Going ahead to step 4:
669 can be fit into 5171 7 times, resulting in a remainder of 488.
The next digit of our result is 7. 
Result so far: 7.0
Deduct 4683 from 5171 and we're left with 488.
Grab the next digit (4) from the dividend, add it to 488, then carry on: 4884 / 669

Step 5:
When dividing 4884 by 669, we get 7 with a remainder of 201.
The number 7 becomes the next digit in our result. 
Result so far: 77.0
If we take 4683 away from 4884, we end up with 201.
Bring next digit (7) of the dividend behind the 201 and repeat the process: 2017 / 669

Going ahead to step 6:
The number 669 fits into 2017 3 times, leaving a remainder of 10.
Write down 3 as next digit of the result. 
Result so far: 773.0
Deduct 2007 from 2017 and we're left with 10.
Grab the next digit (5) from the dividend, add it to 10, then carry on: 105 / 669

On to step 7:
If we divide 105 by 669, we get 0 and a remainder of 105.
The number 0 becomes the next digit in our result. 
Result so far: 7730.0
If we subtract 0 from 105, we get 105.
Bring next digit (7) of the dividend behind the 105 and repeat the process: 1057 / 669

Let's proceed to step 8:
669 goes into 1057 1 times with a remainder of 388.
The number 1 becomes the next digit in our result. 
Result so far: 77301.0
The remainder is 388 after subtracting 669 from 1057.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3880, and continue the process.

Moving on to step 9:
When dividing 3880 by 669, we get 5 with a remainder of 535.
The number 5 becomes the next digit in our result. 
Result so far: 77301.5
Deduct 3345 from 3880 and we're left with 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Advancing to step 10:
5350 divided by 669 is 7 with a remainder of 667.
Record the quotient 7 as the next digit in the result. 
Result so far: 77301.57
If we take 4683 away from 5350, we end up with 667.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6670, and continue the process.

Step 11:
When dividing 6670 by 669, we get 9 with a remainder of 649.
Use 9 as the next digit of our solution. 
Result so far: 77301.579
Subtracting 6021 from 6670 leaves us with 649.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6490, and continue the process.

Advancing to step 12:
669 goes into 6490 9 times with a remainder of 469.
Write down 9 as next digit of the result. 
Result so far: 77301.5799
Deduct 6021 from 6490 and we're left with 469.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4690, and continue the process.

The final result is 77301.5799 with a remainder of 0.00469.