We're dividing 77894 by 15 
The aim is to understand the frequency of 15 in 77894.

Advancing to step 1:
When dividing 7 by 15, we get 0 with a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Take the next digit (7) from the dividend and append it to 7, then repeat: 77 / 15

Advancing to step 2:
15 goes into 77 5 times with a remainder of 2.
Use 5 as the next digit of our solution. 
Result so far: 5.0
Deduct 75 from 77 and we're left with 2.
Bring next digit (8) of the dividend behind the 2 and repeat the process: 28 / 15

On to step 3:
When dividing 28 by 15, we get 1 with a remainder of 13.
Use 1 as the next digit of our solution. 
Result so far: 51.0
Subtracting 15 from 28 leaves us with 13.
Fetch the next digit (9) from the dividend, attach it to 13 and continue: 139 / 15

Moving on to step 4:
15 can be fit into 139 9 times, resulting in a remainder of 4.
The number 9 becomes the next digit in our result. 
Result so far: 519.0
Subtracting 135 from 139 leaves us with 4.
Include the next digit (4) from the dividend after 4, then repeat: 44 / 15

Moving on to step 5:
15 can be fit into 44 2 times, resulting in a remainder of 14.
Write down 2 as next digit of the result. 
Result so far: 5192.0
Subtracting 30 from 44 leaves us 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 6:
The number 15 fits into 140 9 times, leaving a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 5192.9
Subtract 135 from 140 to 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.

Step 7:
If we divide 50 by 15, we get 3 and a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 5192.93
If we subtract 45 from 50, 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.

Let's proceed to step 8:
50 divided by 15 is 3 with a remainder of 5.
Write down 3 as next digit of the result. 
Result so far: 5192.933
If we subtract 45 from 50, 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.

The quotient of the division is 5192.933, and the remainder is 0.0005.