85415509 ÷ 404 
The aim is to understand the frequency of 404 in 85415509.

Moving on to step 1:
The number 404 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Fetch the next digit (5) from the dividend, attach it to 8 and continue: 85 / 404

Moving on to step 2:
The number 404 fits into 85 0 times, leaving a remainder of 85.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 85 leaves us with 85.
Bring next digit (4) of the dividend behind the 85 and repeat the process: 854 / 404

Let's proceed to step 3:
The number 404 fits into 854 2 times, leaving a remainder of 46.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtract 808 from 854 to get 46.
Grab the next digit (1) from the dividend, add it to 46, then carry on: 461 / 404

Let's proceed to step 4:
The number 404 fits into 461 1 times, leaving a remainder of 57.
Record the quotient 1 as the next digit in the result. 
Result so far: 21.0
Subtract 404 from 461 to get 57.
Append the next digit (5) from the dividend to 57 and continue with: 575 / 404

Going ahead to step 5:
404 can be fit into 575 1 times, resulting in a remainder of 171.
Put 1 as the next digit of the answer. 
Result so far: 211.0
Subtract 404 from 575 to get 171.
Include the next digit (5) from the dividend after 171, then repeat: 1715 / 404

Step 6:
The number 404 fits into 1715 4 times, leaving a remainder of 99.
Put 4 as the next digit of the answer. 
Result so far: 2114.0
If we subtract 1616 from 1715, we get 99.
Append the next digit (0) from the dividend to 99 and continue with: 990 / 404

Advancing to step 7:
990 divided by 404 is 2 with a remainder of 182.
Use 2 as the next digit of our solution. 
Result so far: 21142.0
Subtracting 808 from 990 leaves us with 182.
Bring next digit (9) of the dividend behind the 182 and repeat the process: 1829 / 404

Going ahead to step 8:
If we divide 1829 by 404, we get 4 and a remainder of 213.
Put 4 as the next digit of the answer. 
Result so far: 211424.0
Subtracting 1616 from 1829 leaves us with 213.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2130, and continue the process.

On to step 9:
When dividing 2130 by 404, we get 5 with a remainder of 110.
The number 5 becomes the next digit in our result. 
Result so far: 211424.5
Subtracting 2020 from 2130 leaves us with 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Moving on to step 10:
The number 404 fits into 1100 2 times, leaving a remainder of 292.
Put 2 as the next digit of the answer. 
Result so far: 211424.52
Subtracting 808 from 1100 leaves us with 292.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2920, and continue the process.

Let's proceed to step 11:
404 goes into 2920 7 times with a remainder of 92.
Record the quotient 7 as the next digit in the result. 
Result so far: 211424.527
Deduct 2828 from 2920 and we're left with 92.
Since there are no more digits in the dividend, we add a zero to the remainder making it 920, and continue the process.

Let's proceed to step 12:
If we divide 920 by 404, we get 2 and a remainder of 112.
The number 2 becomes the next digit in our result. 
Result so far: 211424.5272
The remainder is 112 after subtracting 808 from 920.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 13:
When dividing 1120 by 404, we get 2 with a remainder of 312.
The next digit of our result is 2. 
Result so far: 211424.52722
If we subtract 808 from 1120, we get 312.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3120, and continue the process.

The final outcome is 211424.52722, with a leftover of 0.000312.