66425297 divided by 231 
The aim is to understand the frequency of 231 in 66425297.

On to step 1:
231 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 231

Let's proceed to step 2:
When dividing 66 by 231, we get 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Bring next digit (4) of the dividend behind the 66 and repeat the process: 664 / 231

Moving on to step 3:
The number 231 fits into 664 2 times, leaving a remainder of 202.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 462 from 664, we get 202.
Grab the next digit (2) from the dividend, add it to 202, then carry on: 2022 / 231

Let's proceed to step 4:
231 can be fit into 2022 8 times, resulting in a remainder of 174.
Write down 8 as next digit of the result. 
Result so far: 28.0
Subtracting 1848 from 2022 leaves us with 174.
Fetch the next digit (5) from the dividend, attach it to 174 and continue: 1745 / 231

Going ahead to step 5:
1745 divided by 231 is 7 with a remainder of 128.
Record the quotient 7 as the next digit in the result. 
Result so far: 287.0
The remainder is 128 after subtracting 1617 from 1745.
Include the next digit (2) from the dividend after 128, then repeat: 1282 / 231

Step 6:
231 can be fit into 1282 5 times, resulting in a remainder of 127.
The number 5 becomes the next digit in our result. 
Result so far: 2875.0
The remainder is 127 after subtracting 1155 from 1282.
Take the next digit (9) from the dividend and append it to 127, then repeat: 1279 / 231

On to step 7:
When dividing 1279 by 231, we get 5 with a remainder of 124.
Write down 5 as next digit of the result. 
Result so far: 28755.0
If we subtract 1155 from 1279, we get 124.
Include the next digit (7) from the dividend after 124, then repeat: 1247 / 231

Going ahead to step 8:
When dividing 1247 by 231, we get 5 with a remainder of 92.
Use 5 as the next digit of our solution. 
Result so far: 287555.0
If we take 1155 away from 1247, we end up with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Let's proceed to step 9:
920 divided by 231 is 3 with a remainder of 227.
The next digit of our result is 3. 
Result so far: 287555.3
Subtracting 693 from 920 leaves us with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Moving on to step 10:
When dividing 2270 by 231, we get 9 with a remainder of 191.
The next digit of our result is 9. 
Result so far: 287555.39
If we subtract 2079 from 2270, we get 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

On to step 11:
231 goes into 1910 8 times with a remainder of 62.
The number 8 becomes the next digit in our result. 
Result so far: 287555.398
Deduct 1848 from 1910 and we're left with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 12:
231 goes into 620 2 times with a remainder of 158.
The next digit of our result is 2. 
Result so far: 287555.3982
If we take 462 away from 620, we end up with 158.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1580, and continue the process.

Let's proceed to step 13:
When dividing 1580 by 231, we get 6 with a remainder of 194.
Record the quotient 6 as the next digit in the result. 
Result so far: 287555.39826
The remainder is 194 after subtracting 1386 from 1580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1940, and continue the process.

Going ahead to step 14:
231 goes into 1940 8 times with a remainder of 92.
Put 8 as the next digit of the answer. 
Result so far: 287555.398268
Subtracting 1848 from 1940 leaves us with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Advancing to step 15:
231 can be fit into 920 3 times, resulting in a remainder of 227.
Write down 3 as next digit of the result. 
Result so far: 287555.3982683
Subtract 693 from 920 to get 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Moving on to step 16:
If we divide 2270 by 231, we get 9 and a remainder of 191.
The number 9 becomes the next digit in our result. 
Result so far: 287555.39826839
If we subtract 2079 from 2270, we get 191.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1910, and continue the process.

The final outcome is 287555.39826839, with a leftover of 1.91e-07.