66315671 ÷ 286 
The aim is to understand the frequency of 286 in 66315671.

Let's proceed to step 1:
6 divided by 286 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 286

Step 2:
The number 286 fits into 66 0 times, leaving a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Grab the next digit (3) from the dividend, add it to 66, then carry on: 663 / 286

Moving on to step 3:
If we divide 663 by 286, we get 2 and a remainder of 91.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 572 from 663 leaves us with 91.
Grab the next digit (1) from the dividend, add it to 91, then carry on: 911 / 286

On to step 4:
If we divide 911 by 286, we get 3 and a remainder of 53.
Write down 3 as next digit of the result. 
Result so far: 23.0
If we take 858 away from 911, we end up with 53.
Take the next digit (5) from the dividend and append it to 53, then repeat: 535 / 286

On to step 5:
286 can be fit into 535 1 times, resulting in a remainder of 249.
Record the quotient 1 as the next digit in the result. 
Result so far: 231.0
Subtracting 286 from 535 leaves us with 249.
Fetch the next digit (6) from the dividend, attach it to 249 and continue: 2496 / 286

Moving on to step 6:
When dividing 2496 by 286, we get 8 with a remainder of 208.
Put 8 as the next digit of the answer. 
Result so far: 2318.0
Deduct 2288 from 2496 and we're left with 208.
Fetch the next digit (7) from the dividend, attach it to 208 and continue: 2087 / 286

On to step 7:
2087 divided by 286 is 7 with a remainder of 85.
The number 7 becomes the next digit in our result. 
Result so far: 23187.0
Subtract 2002 from 2087 to get 85.
Take the next digit (1) from the dividend and append it to 85, then repeat: 851 / 286

Step 8:
If we divide 851 by 286, we get 2 and a remainder of 279.
Put 2 as the next digit of the answer. 
Result so far: 231872.0
Deduct 572 from 851 and we're left with 279.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2790, and continue the process.

Let's proceed to step 9:
2790 divided by 286 is 9 with a remainder of 216.
Write down 9 as next digit of the result. 
Result so far: 231872.9
Subtract 2574 from 2790 to get 216.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2160, and continue the process.

On to step 10:
The number 286 fits into 2160 7 times, leaving a remainder of 158.
Write down 7 as next digit of the result. 
Result so far: 231872.97
If we subtract 2002 from 2160, we get 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Step 11:
1580 divided by 286 is 5 with a remainder of 150.
Write down 5 as next digit of the result. 
Result so far: 231872.975
Subtracting 1430 from 1580 leaves us with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Step 12:
When dividing 1500 by 286, we get 5 with a remainder of 70.
The number 5 becomes the next digit in our result. 
Result so far: 231872.9755
Subtract 1430 from 1500 to get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

The final result is 231872.9755 with a remainder of 0.0007.