28621431 ÷ 266 
The aim is to understand the frequency of 266 in 28621431.

Advancing to step 1:
When dividing 2 by 266, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 266

On to step 2:
When dividing 28 by 266, we get 0 with a remainder of 28.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 28, we end up with 28.
Fetch the next digit (6) from the dividend, attach it to 28 and continue: 286 / 266

Step 3:
The number 266 fits into 286 1 times, leaving a remainder of 20.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we take 266 away from 286, we end up with 20.
Include the next digit (2) from the dividend after 20, then repeat: 202 / 266

Step 4:
The number 266 fits into 202 0 times, leaving a remainder of 202.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 202 to get 202.
Include the next digit (1) from the dividend after 202, then repeat: 2021 / 266

Advancing to step 5:
If we divide 2021 by 266, we get 7 and a remainder of 159.
Put 7 as the next digit of the answer. 
Result so far: 107.0
Subtract 1862 from 2021 to get 159.
Append the next digit (4) from the dividend to 159 and continue with: 1594 / 266

Let's proceed to step 6:
When dividing 1594 by 266, we get 5 with a remainder of 264.
The number 5 becomes the next digit in our result. 
Result so far: 1075.0
Deduct 1330 from 1594 and we're left with 264.
Fetch the next digit (3) from the dividend, attach it to 264 and continue: 2643 / 266

Step 7:
266 can be fit into 2643 9 times, resulting in a remainder of 249.
The next digit of our result is 9. 
Result so far: 10759.0
Deduct 2394 from 2643 and we're left with 249.
Include the next digit (1) from the dividend after 249, then repeat: 2491 / 266

Going ahead to step 8:
266 can be fit into 2491 9 times, resulting in a remainder of 97.
The number 9 becomes the next digit in our result. 
Result so far: 107599.0
If we subtract 2394 from 2491, we get 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

Let's proceed to step 9:
When dividing 970 by 266, we get 3 with a remainder of 172.
Record the quotient 3 as the next digit in the result. 
Result so far: 107599.3
Subtract 798 from 970 to get 172.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1720, and continue the process.

Step 10:
266 goes into 1720 6 times with a remainder of 124.
Put 6 as the next digit of the answer. 
Result so far: 107599.36
Subtracting 1596 from 1720 leaves us with 124.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1240, and continue the process.

Step 11:
266 goes into 1240 4 times with a remainder of 176.
Put 4 as the next digit of the answer. 
Result so far: 107599.364
Subtracting 1064 from 1240 leaves us with 176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1760, and continue the process.

Step 12:
266 goes into 1760 6 times with a remainder of 164.
The next digit of our result is 6. 
Result so far: 107599.3646
Subtracting 1596 from 1760 leaves us 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 13:
266 can be fit into 1640 6 times, resulting in a remainder of 44.
Use 6 as the next digit of our solution. 
Result so far: 107599.36466
Subtracting 1596 from 1640 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The final outcome is 107599.36466, with a leftover of 4.4e-05.