409615 divided by 85 
The aim is to understand the frequency of 85 in 409615.

On to step 1:
85 goes into 4 0 times with a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Bring next digit (0) of the dividend behind the 4 and repeat the process: 40 / 85

On to step 2:
When dividing 40 by 85, we get 0 with a remainder of 40.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 40, we end up with 40.
Fetch the next digit (9) from the dividend, attach it to 40 and continue: 409 / 85

Step 3:
409 divided by 85 is 4 with a remainder of 69.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtract 340 from 409 to get 69.
Grab the next digit (6) from the dividend, add it to 69, then carry on: 696 / 85

Advancing to step 4:
The number 85 fits into 696 8 times, leaving a remainder of 16.
Write down 8 as next digit of the result. 
Result so far: 48.0
Subtract 680 from 696 to get 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 85

Advancing to step 5:
The number 85 fits into 161 1 times, leaving a remainder of 76.
Use 1 as the next digit of our solution. 
Result so far: 481.0
Deduct 85 from 161 and we're left with 76.
Fetch the next digit (5) from the dividend, attach it to 76 and continue: 765 / 85

Let's proceed to step 6:
85 goes into 765 9 times with a remainder of 0.
The next digit of our result is 9. 
Result so far: 4819.0
The remainder is 0 after subtracting 765 from 765.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 7:
85 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 4819.0
Deduct 0 from 0 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 8:
If we divide 0 by 85, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 4819.0
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 4819.0, with a leftover of 0.0.