We divide 66501354 by 669
The aim is to understand the frequency of 669 in 66501354.

Step 1:
When dividing 6 by 669, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 669

On to step 2:
669 can be fit into 66 0 times, resulting in a remainder of 66.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Append the next digit (5) from the dividend to 66 and continue with: 665 / 669

Step 3:
665 divided by 669 is 0 with a remainder of 665.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 665, we get 665.
Take the next digit (0) from the dividend and append it to 665, then repeat: 6650 / 669

On to step 4:
The number 669 fits into 6650 9 times, leaving a remainder of 629.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 6021 from 6650 and we're left with 629.
Bring next digit (1) of the dividend behind the 629 and repeat the process: 6291 / 669

Advancing to step 5:
When dividing 6291 by 669, we get 9 with a remainder of 270.
Put 9 as the next digit of the answer. 
Result so far: 99.0
Subtract 6021 from 6291 to get 270.
Fetch the next digit (3) from the dividend, attach it to 270 and continue: 2703 / 669

Step 6:
669 can be fit into 2703 4 times, resulting in a remainder of 27.
Use 4 as the next digit of our solution. 
Result so far: 994.0
The remainder is 27 after subtracting 2676 from 2703.
Fetch the next digit (5) from the dividend, attach it to 27 and continue: 275 / 669

Step 7:
The number 669 fits into 275 0 times, leaving a remainder of 275.
Write down 0 as next digit of the result. 
Result so far: 9940.0
The remainder is 275 after subtracting 0 from 275.
Fetch the next digit (4) from the dividend, attach it to 275 and continue: 2754 / 669

On to step 8:
If we divide 2754 by 669, we get 4 and a remainder of 78.
The number 4 becomes the next digit in our result. 
Result so far: 99404.0
Subtracting 2676 from 2754 leaves us with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Let's proceed to step 9:
If we divide 780 by 669, we get 1 and a remainder of 111.
Use 1 as the next digit of our solution. 
Result so far: 99404.1
Deduct 669 from 780 and we're left with 111.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1110, and continue the process.

Moving on to step 10:
669 can be fit into 1110 1 times, resulting in a remainder of 441.
Use 1 as the next digit of our solution. 
Result so far: 99404.11
Subtracting 669 from 1110 leaves us with 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Our division results in 99404.11 with a remaining 0.441.