57255049 divided by 669 
The aim is to understand the frequency of 669 in 57255049.

Going ahead 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
Subtracting 0 from 5 leaves us with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 669

Moving on to step 2:
669 can be fit into 57 0 times, resulting in a remainder of 57.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 57, we end up with 57.
Append the next digit (2) from the dividend to 57 and continue with: 572 / 669

On to step 3:
669 goes into 572 0 times with a remainder of 572.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 572 after subtracting 0 from 572.
Include the next digit (5) from the dividend after 572, then repeat: 5725 / 669

Step 4:
5725 divided by 669 is 8 with a remainder of 373.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtracting 5352 from 5725 leaves us with 373.
Take the next digit (5) from the dividend and append it to 373, then repeat: 3735 / 669

Moving on to step 5:
When dividing 3735 by 669, we get 5 with a remainder of 390.
Put 5 as the next digit of the answer. 
Result so far: 85.0
The remainder is 390 after subtracting 3345 from 3735.
Append the next digit (0) from the dividend to 390 and continue with: 3900 / 669

Step 6:
669 can be fit into 3900 5 times, resulting in a remainder of 555.
Put 5 as the next digit of the answer. 
Result so far: 855.0
Subtract 3345 from 3900 to get 555.
Bring next digit (4) of the dividend behind the 555 and repeat the process: 5554 / 669

Advancing to step 7:
669 can be fit into 5554 8 times, resulting in a remainder of 202.
Use 8 as the next digit of our solution. 
Result so far: 8558.0
The remainder is 202 after subtracting 5352 from 5554.
Append the next digit (9) from the dividend to 202 and continue with: 2029 / 669

Advancing to step 8:
When dividing 2029 by 669, we get 3 with a remainder of 22.
Write down 3 as next digit of the result. 
Result so far: 85583.0
If we take 2007 away from 2029, we end up with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

On to step 9:
The number 669 fits into 220 0 times, leaving a remainder of 220.
Write down 0 as next digit of the result. 
Result so far: 85583.0
Subtracting 0 from 220 leaves us with 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2200, and continue the process.

On to step 10:
2200 divided by 669 is 3 with a remainder of 193.
Record the quotient 3 as the next digit in the result. 
Result so far: 85583.03
Deduct 2007 from 2200 and we're left with 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

On to step 11:
The number 669 fits into 1930 2 times, leaving a remainder of 592.
Write down 2 as next digit of the result. 
Result so far: 85583.032
If we subtract 1338 from 1930, we get 592.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5920, and continue the process.

Going ahead to step 12:
669 can be fit into 5920 8 times, resulting in a remainder of 568.
Use 8 as the next digit of our solution. 
Result so far: 85583.0328
If we subtract 5352 from 5920, we get 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Let's proceed to step 13:
669 goes into 5680 8 times with a remainder of 328.
The next digit of our result is 8. 
Result so far: 85583.03288
If we take 5352 away from 5680, we end up with 328.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3280, and continue the process.

The final result is 85583.03288 with a remainder of 0.000328.