42023058 ÷ 666 
The aim is to understand the frequency of 666 in 42023058.

Step 1:
The number 666 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 4 to get 4.
Bring next digit (2) of the dividend behind the 4 and repeat the process: 42 / 666

Going ahead to step 2:
The number 666 fits into 42 0 times, leaving a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 42, we get 42.
Include the next digit (0) from the dividend after 42, then repeat: 420 / 666

Moving on to step 3:
666 goes into 420 0 times with a remainder of 420.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 420, we end up with 420.
Include the next digit (2) from the dividend after 420, then repeat: 4202 / 666

Step 4:
4202 divided by 666 is 6 with a remainder of 206.
Put 6 as the next digit of the answer. 
Result so far: 6.0
Deduct 3996 from 4202 and we're left with 206.
Grab the next digit (3) from the dividend, add it to 206, then carry on: 2063 / 666

Moving on to step 5:
666 can be fit into 2063 3 times, resulting in a remainder of 65.
The number 3 becomes the next digit in our result. 
Result so far: 63.0
If we take 1998 away from 2063, we end up with 65.
Append the next digit (0) from the dividend to 65 and continue with: 650 / 666

Moving on to step 6:
666 can be fit into 650 0 times, resulting in a remainder of 650.
Put 0 as the next digit of the answer. 
Result so far: 630.0
Subtract 0 from 650 to get 650.
Bring next digit (5) of the dividend behind the 650 and repeat the process: 6505 / 666

On to step 7:
When dividing 6505 by 666, we get 9 with a remainder of 511.
Put 9 as the next digit of the answer. 
Result so far: 6309.0
Subtracting 5994 from 6505 leaves us with 511.
Bring next digit (8) of the dividend behind the 511 and repeat the process: 5118 / 666

Advancing to step 8:
When dividing 5118 by 666, we get 7 with a remainder of 456.
Put 7 as the next digit of the answer. 
Result so far: 63097.0
Deduct 4662 from 5118 and we're left with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Advancing to step 9:
666 goes into 4560 6 times with a remainder of 564.
Write down 6 as next digit of the result. 
Result so far: 63097.6
If we subtract 3996 from 4560, we get 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Advancing to step 10:
If we divide 5640 by 666, we get 8 and a remainder of 312.
The next digit of our result is 8. 
Result so far: 63097.68
Subtracting 5328 from 5640 leaves us with 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

On to step 11:
3120 divided by 666 is 4 with a remainder of 456.
The number 4 becomes the next digit in our result. 
Result so far: 63097.684
If we subtract 2664 from 3120, we get 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

On to step 12:
If we divide 4560 by 666, we get 6 and a remainder of 564.
Record the quotient 6 as the next digit in the result. 
Result so far: 63097.6846
If we subtract 3996 from 4560, we get 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Advancing to step 13:
666 goes into 5640 8 times with a remainder of 312.
Put 8 as the next digit of the answer. 
Result so far: 63097.68468
Subtract 5328 from 5640 to get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

Step 14:
If we divide 3120 by 666, we get 4 and a remainder of 456.
The next digit of our result is 4. 
Result so far: 63097.684684
The remainder is 456 after subtracting 2664 from 3120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

On to step 15:
666 goes into 4560 6 times with a remainder of 564.
Record the quotient 6 as the next digit in the result. 
Result so far: 63097.6846846
If we take 3996 away from 4560, we end up with 564.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5640, and continue the process.

Going ahead to step 16:
666 goes into 5640 8 times with a remainder of 312.
The next digit of our result is 8. 
Result so far: 63097.68468468
The remainder is 312 after subtracting 5328 from 5640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

The final result is 63097.68468468 with a remainder of 3.12e-07.