We look at the division of 22279 by 15 
The aim is to understand the frequency of 15 in 22279.

Advancing to step 1:
2 divided by 15 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Append the next digit (2) from the dividend to 2 and continue with: 22 / 15

Step 2:
15 can be fit into 22 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 15 from 22 leaves us with 7.
Bring next digit (2) of the dividend behind the 7 and repeat the process: 72 / 15

Advancing to step 3:
If we divide 72 by 15, we get 4 and a remainder of 12.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
The remainder is 12 after subtracting 60 from 72.
Bring next digit (7) of the dividend behind the 12 and repeat the process: 127 / 15

Let's proceed to step 4:
127 divided by 15 is 8 with a remainder of 7.
Use 8 as the next digit of our solution. 
Result so far: 148.0
Deduct 120 from 127 and we're left with 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 15

Advancing to step 5:
When dividing 79 by 15, we get 5 with a remainder of 4.
Write down 5 as next digit of the result. 
Result so far: 1485.0
Subtracting 75 from 79 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Advancing to step 6:
15 goes into 40 2 times with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 1485.2
Subtracting 30 from 40 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.

Advancing to step 7:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 1485.26
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.

On to step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Put 6 as the next digit of the answer. 
Result so far: 1485.266
If we subtract 90 from 100, we 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.

Our division results in 1485.266 with a remaining 0.001.