76418906 ÷ 666 
The aim is to understand the frequency of 666 in 76418906.

On to step 1:
If we divide 7 by 666, we get 0 and a remainder of 7.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Take the next digit (6) from the dividend and append it to 7, then repeat: 76 / 666

Moving on to step 2:
The number 666 fits into 76 0 times, leaving a remainder of 76.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 76, we end up with 76.
Bring next digit (4) of the dividend behind the 76 and repeat the process: 764 / 666

On to step 3:
If we divide 764 by 666, we get 1 and a remainder of 98.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 666 away from 764, we end up with 98.
Include the next digit (1) from the dividend after 98, then repeat: 981 / 666

Going ahead to step 4:
666 can be fit into 981 1 times, resulting in a remainder of 315.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
Subtract 666 from 981 to get 315.
Include the next digit (8) from the dividend after 315, then repeat: 3158 / 666

Moving on to step 5:
If we divide 3158 by 666, we get 4 and a remainder of 494.
Write down 4 as next digit of the result. 
Result so far: 114.0
Subtract 2664 from 3158 to get 494.
Bring next digit (9) of the dividend behind the 494 and repeat the process: 4949 / 666

Moving on to step 6:
4949 divided by 666 is 7 with a remainder of 287.
Write down 7 as next digit of the result. 
Result so far: 1147.0
If we subtract 4662 from 4949, we get 287.
Include the next digit (0) from the dividend after 287, then repeat: 2870 / 666

Advancing to step 7:
666 goes into 2870 4 times with a remainder of 206.
Put 4 as the next digit of the answer. 
Result so far: 11474.0
Subtract 2664 from 2870 to get 206.
Append the next digit (6) from the dividend to 206 and continue with: 2066 / 666

Going ahead to step 8:
The number 666 fits into 2066 3 times, leaving a remainder of 68.
Record the quotient 3 as the next digit in the result. 
Result so far: 114743.0
Subtracting 1998 from 2066 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 9:
680 divided by 666 is 1 with a remainder of 14.
Record the quotient 1 as the next digit in the result. 
Result so far: 114743.1
If we take 666 away from 680, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 10:
666 can be fit into 140 0 times, resulting in a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 114743.1
The remainder is 140 after subtracting 0 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Let's proceed to step 11:
When dividing 1400 by 666, we get 2 with a remainder of 68.
The number 2 becomes the next digit in our result. 
Result so far: 114743.102
Subtract 1332 from 1400 to get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Going ahead to step 12:
666 goes into 680 1 times with a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 114743.1021
If we take 666 away from 680, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Advancing to step 13:
If we divide 140 by 666, we get 0 and a remainder of 140.
Put 0 as the next digit of the answer. 
Result so far: 114743.1021
If we subtract 0 from 140, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Advancing to step 14:
When dividing 1400 by 666, we get 2 with a remainder of 68.
The next digit of our result is 2. 
Result so far: 114743.102102
The remainder is 68 after subtracting 1332 from 1400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 15:
If we divide 680 by 666, we get 1 and a remainder of 14.
The number 1 becomes the next digit in our result. 
Result so far: 114743.1021021
If we take 666 away from 680, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Step 16:
When dividing 140 by 666, we get 0 with a remainder of 140.
Record the quotient 0 as the next digit in the result. 
Result so far: 114743.1021021
The remainder is 140 after subtracting 0 from 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The final result is 114743.1021021 with a remainder of 1.4e-07.