53975239 ÷ 266 
The aim is to understand the frequency of 266 in 53975239.

Step 1:
When dividing 5 by 266, we get 0 with a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Append the next digit (3) from the dividend to 5 and continue with: 53 / 266

Moving on to step 2:
53 divided by 266 is 0 with a remainder of 53.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 53 and we're left with 53.
Take the next digit (9) from the dividend and append it to 53, then repeat: 539 / 266

Step 3:
The number 266 fits into 539 2 times, leaving a remainder of 7.
The next digit of our result is 2. 
Result so far: 2.0
If we take 532 away from 539, we end up with 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 266

Moving on to step 4:
When dividing 77 by 266, we get 0 with a remainder of 77.
The number 0 becomes the next digit in our result. 
Result so far: 20.0
Subtracting 0 from 77 leaves us with 77.
Include the next digit (5) from the dividend after 77, then repeat: 775 / 266

Going ahead to step 5:
266 can be fit into 775 2 times, resulting in a remainder of 243.
Record the quotient 2 as the next digit in the result. 
Result so far: 202.0
If we take 532 away from 775, we end up with 243.
Bring next digit (2) of the dividend behind the 243 and repeat the process: 2432 / 266

Let's proceed to step 6:
266 can be fit into 2432 9 times, resulting in a remainder of 38.
Use 9 as the next digit of our solution. 
Result so far: 2029.0
The remainder is 38 after subtracting 2394 from 2432.
Grab the next digit (3) from the dividend, add it to 38, then carry on: 383 / 266

Going ahead to step 7:
383 divided by 266 is 1 with a remainder of 117.
Record the quotient 1 as the next digit in the result. 
Result so far: 20291.0
If we take 266 away from 383, we end up with 117.
Include the next digit (9) from the dividend after 117, then repeat: 1179 / 266

Step 8:
266 goes into 1179 4 times with a remainder of 115.
Use 4 as the next digit of our solution. 
Result so far: 202914.0
If we subtract 1064 from 1179, we get 115.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1150, and continue the process.

Step 9:
If we divide 1150 by 266, we get 4 and a remainder of 86.
The next digit of our result is 4. 
Result so far: 202914.4
Deduct 1064 from 1150 and we're left with 86.
Since there are no more digits in the dividend, we add a zero to the remainder making it 860, and continue the process.

Let's proceed to step 10:
When dividing 860 by 266, we get 3 with a remainder of 62.
Write down 3 as next digit of the result. 
Result so far: 202914.43
Deduct 798 from 860 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.

Going ahead to step 11:
266 can be fit into 620 2 times, resulting in a remainder of 88.
Put 2 as the next digit of the answer. 
Result so far: 202914.432
Subtract 532 from 620 to get 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Going ahead to step 12:
When dividing 880 by 266, we get 3 with a remainder of 82.
The next digit of our result is 3. 
Result so far: 202914.4323
Subtracting 798 from 880 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

On to step 13:
The number 266 fits into 820 3 times, leaving a remainder of 22.
The next digit of our result is 3. 
Result so far: 202914.43233
Subtract 798 from 820 to get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

The final result is 202914.43233 with a remainder of 2.2e-05.