526916 divided by 15 
The aim is to understand the frequency of 15 in 526916.

On to step 1:
15 can be fit into 5 0 times, resulting in a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 5 and we're left with 5.
Include the next digit (2) from the dividend after 5, then repeat: 52 / 15

Step 2:
When dividing 52 by 15, we get 3 with a remainder of 7.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 45 away from 52, we end up with 7.
Fetch the next digit (6) from the dividend, attach it to 7 and continue: 76 / 15

Going ahead to step 3:
76 divided by 15 is 5 with a remainder of 1.
Write down 5 as next digit of the result. 
Result so far: 35.0
Deduct 75 from 76 and we're left with 1.
Include the next digit (9) from the dividend after 1, then repeat: 19 / 15

On to step 4:
If we divide 19 by 15, we get 1 and a remainder of 4.
Use 1 as the next digit of our solution. 
Result so far: 351.0
Subtracting 15 from 19 leaves us with 4.
Bring next digit (1) of the dividend behind the 4 and repeat the process: 41 / 15

Moving on to step 5:
15 can be fit into 41 2 times, resulting in a remainder of 11.
Put 2 as the next digit of the answer. 
Result so far: 3512.0
Subtracting 30 from 41 leaves us with 11.
Take the next digit (6) from the dividend and append it to 11, then repeat: 116 / 15

On to step 6:
When dividing 116 by 15, we get 7 with a remainder of 11.
Put 7 as the next digit of the answer. 
Result so far: 35127.0
Subtracting 105 from 116 leaves us with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Moving on to step 7:
If we divide 110 by 15, we get 7 and a remainder of 5.
The next digit of our result is 7. 
Result so far: 35127.7
Subtracting 105 from 110 leaves us 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.

Advancing to step 8:
15 can be fit into 50 3 times, resulting in a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 35127.73
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.

Advancing to step 9:
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: 35127.733
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.

The final result is 35127.733 with a remainder of 0.0005.