We divide 269623 by 15
The aim is to understand the frequency of 15 in 269623.

On to step 1:
When dividing 2 by 15, we get 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 15

Moving on to step 2:
The number 15 fits into 26 1 times, leaving a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 15 from 26, we get 11.
Take the next digit (9) from the dividend and append it to 11, then repeat: 119 / 15

Going ahead to step 3:
If we divide 119 by 15, we get 7 and a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 17.0
If we take 105 away from 119, we end up with 14.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 15

Going ahead to step 4:
When dividing 146 by 15, we get 9 with a remainder of 11.
Record the quotient 9 as the next digit in the result. 
Result so far: 179.0
The remainder is 11 after subtracting 135 from 146.
Grab the next digit (2) from the dividend, add it to 11, then carry on: 112 / 15

Advancing to step 5:
112 divided by 15 is 7 with a remainder of 7.
Use 7 as the next digit of our solution. 
Result so far: 1797.0
Subtract 105 from 112 to get 7.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 15

Advancing to step 6:
15 goes into 73 4 times with a remainder of 13.
Put 4 as the next digit of the answer. 
Result so far: 17974.0
Deduct 60 from 73 and we're left with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 7:
15 goes into 130 8 times with a remainder of 10.
Write down 8 as next digit of the result. 
Result so far: 17974.8
Subtract 120 from 130 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
15 goes into 100 6 times with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 17974.86
If we take 90 away from 100, we end up with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
When dividing 100 by 15, we get 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 17974.866
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final result is 17974.866 with a remainder of 0.001.