We divide 183119 by 15
The aim is to understand the frequency of 15 in 183119.

Moving on to step 1:
When dividing 1 by 15, we get 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Grab the next digit (8) from the dividend, add it to 1, then carry on: 18 / 15

Going ahead to step 2:
If we divide 18 by 15, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we subtract 15 from 18, we get 3.
Append the next digit (3) from the dividend to 3 and continue with: 33 / 15

On to step 3:
15 goes into 33 2 times with a remainder of 3.
Write down 2 as next digit of the result. 
Result so far: 12.0
If we subtract 30 from 33, we get 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 15

Advancing to step 4:
If we divide 31 by 15, we get 2 and a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 122.0
Deduct 30 from 31 and we're left with 1.
Fetch the next digit (1) from the dividend, attach it to 1 and continue: 11 / 15

Going ahead to step 5:
11 divided by 15 is 0 with a remainder of 11.
Write down 0 as next digit of the result. 
Result so far: 1220.0
Deduct 0 from 11 and we're left with 11.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 15

Going ahead to step 6:
If we divide 119 by 15, we get 7 and a remainder of 14.
Record the quotient 7 as the next digit in the result. 
Result so far: 12207.0
If we take 105 away from 119, we end up with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
If we divide 140 by 15, we get 9 and a remainder of 5.
Record the quotient 9 as the next digit in the result. 
Result so far: 12207.9
If we subtract 135 from 140, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 8:
15 goes into 50 3 times with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 12207.93
If we take 45 away from 50, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
15 goes into 50 3 times with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 12207.933
Deduct 45 from 50 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The quotient of the division is 12207.933, and the remainder is 0.0005.