We look at the division of 45769 by 15 
The aim is to understand the frequency of 15 in 45769.

Step 1:
If we divide 4 by 15, we get 0 and a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 15

Step 2:
15 can be fit into 45 3 times, resulting in a remainder of 0.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 45 from 45 and we're left with 0.
Include the next digit (7) from the dividend after 0, then repeat: 7 / 15

On to step 3:
7 divided by 15 is 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 30.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 15

On to step 4:
15 can be fit into 76 5 times, resulting in a remainder of 1.
Put 5 as the next digit of the answer. 
Result so far: 305.0
If we take 75 away from 76, we end up with 1.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 15

Let's proceed to step 5:
19 divided by 15 is 1 with a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 3051.0
If we take 15 away from 19, we end up 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:
If we divide 40 by 15, we get 2 and a remainder of 10.
Write down 2 as next digit of the result. 
Result so far: 3051.2
If we take 30 away from 40, 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.

On to step 7:
When dividing 100 by 15, we get 6 with a remainder of 10.
Write down 6 as next digit of the result. 
Result so far: 3051.26
Deduct 90 from 100 and we're left 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: 3051.266
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.

The final result is 3051.266 with a remainder of 0.001.