25964759 divided by 666 
The aim is to understand the frequency of 666 in 25964759.

On to step 1:
666 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 666

Advancing to step 2:
25 divided by 666 is 0 with a remainder of 25.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 25 to get 25.
Take the next digit (9) from the dividend and append it to 25, then repeat: 259 / 666

Moving on to step 3:
When dividing 259 by 666, we get 0 with a remainder of 259.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 259, we get 259.
Fetch the next digit (6) from the dividend, attach it to 259 and continue: 2596 / 666

Advancing to step 4:
If we divide 2596 by 666, we get 3 and a remainder of 598.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 1998 from 2596 to get 598.
Grab the next digit (4) from the dividend, add it to 598, then carry on: 5984 / 666

Advancing to step 5:
5984 divided by 666 is 8 with a remainder of 656.
Put 8 as the next digit of the answer. 
Result so far: 38.0
If we take 5328 away from 5984, we end up with 656.
Take the next digit (7) from the dividend and append it to 656, then repeat: 6567 / 666

Let's proceed to step 6:
666 goes into 6567 9 times with a remainder of 573.
Write down 9 as next digit of the result. 
Result so far: 389.0
Deduct 5994 from 6567 and we're left with 573.
Take the next digit (5) from the dividend and append it to 573, then repeat: 5735 / 666

Going ahead to step 7:
5735 divided by 666 is 8 with a remainder of 407.
Put 8 as the next digit of the answer. 
Result so far: 3898.0
The remainder is 407 after subtracting 5328 from 5735.
Append the next digit (9) from the dividend to 407 and continue with: 4079 / 666

Advancing to step 8:
When dividing 4079 by 666, we get 6 with a remainder of 83.
Use 6 as the next digit of our solution. 
Result so far: 38986.0
Deduct 3996 from 4079 and we're left with 83.
Since there are no more digits in the dividend, we add a zero to the remainder making it 830, and continue the process.

Let's proceed to step 9:
When dividing 830 by 666, we get 1 with a remainder of 164.
Use 1 as the next digit of our solution. 
Result so far: 38986.1
If we take 666 away from 830, we end up with 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Going ahead to step 10:
The number 666 fits into 1640 2 times, leaving a remainder of 308.
Record the quotient 2 as the next digit in the result. 
Result so far: 38986.12
Subtract 1332 from 1640 to get 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

On to step 11:
When dividing 3080 by 666, we get 4 with a remainder of 416.
Put 4 as the next digit of the answer. 
Result so far: 38986.124
If we subtract 2664 from 3080, we get 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Moving on to step 12:
The number 666 fits into 4160 6 times, leaving a remainder of 164.
The next digit of our result is 6. 
Result so far: 38986.1246
Subtract 3996 from 4160 to get 164.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Step 13:
1640 divided by 666 is 2 with a remainder of 308.
Put 2 as the next digit of the answer. 
Result so far: 38986.12462
Deduct 1332 from 1640 and we're left with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

Moving on to step 14:
The number 666 fits into 3080 4 times, leaving a remainder of 416.
Write down 4 as next digit of the result. 
Result so far: 38986.124624
Subtracting 2664 from 3080 leaves us with 416.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4160, and continue the process.

Step 15:
If we divide 4160 by 666, we get 6 and a remainder of 164.
The next digit of our result is 6. 
Result so far: 38986.1246246
The remainder is 164 after subtracting 3996 from 4160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1640, and continue the process.

Step 16:
The number 666 fits into 1640 2 times, leaving a remainder of 308.
Use 2 as the next digit of our solution. 
Result so far: 38986.12462462
If we take 1332 away from 1640, we end up with 308.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3080, and continue the process.

In conclusion, the division gives 38986.12462462 with a balance of 3.08e-07.