Let's divide 78680585 by 409
The aim is to understand the frequency of 409 in 78680585.

Step 1:
The number 409 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Take the next digit (8) from the dividend and append it to 7, then repeat: 78 / 409

Moving on to step 2:
409 can be fit into 78 0 times, resulting in a remainder of 78.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Include the next digit (6) from the dividend after 78, then repeat: 786 / 409

On to step 3:
The number 409 fits into 786 1 times, leaving a remainder of 377.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 409 from 786 and we're left with 377.
Grab the next digit (8) from the dividend, add it to 377, then carry on: 3778 / 409

Step 4:
If we divide 3778 by 409, we get 9 and a remainder of 97.
Write down 9 as next digit of the result. 
Result so far: 19.0
If we take 3681 away from 3778, we end up with 97.
Take the next digit (0) from the dividend and append it to 97, then repeat: 970 / 409

Step 5:
970 divided by 409 is 2 with a remainder of 152.
Put 2 as the next digit of the answer. 
Result so far: 192.0
The remainder is 152 after subtracting 818 from 970.
Include the next digit (5) from the dividend after 152, then repeat: 1525 / 409

Advancing to step 6:
If we divide 1525 by 409, we get 3 and a remainder of 298.
Put 3 as the next digit of the answer. 
Result so far: 1923.0
Subtract 1227 from 1525 to get 298.
Include the next digit (8) from the dividend after 298, then repeat: 2988 / 409

Let's proceed to step 7:
When dividing 2988 by 409, we get 7 with a remainder of 125.
The next digit of our result is 7. 
Result so far: 19237.0
Deduct 2863 from 2988 and we're left with 125.
Append the next digit (5) from the dividend to 125 and continue with: 1255 / 409

Moving on to step 8:
1255 divided by 409 is 3 with a remainder of 28.
Record the quotient 3 as the next digit in the result. 
Result so far: 192373.0
The remainder is 28 after subtracting 1227 from 1255.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
If we divide 280 by 409, we get 0 and a remainder of 280.
Put 0 as the next digit of the answer. 
Result so far: 192373.0
If we subtract 0 from 280, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

On to step 10:
When dividing 2800 by 409, we get 6 with a remainder of 346.
The number 6 becomes the next digit in our result. 
Result so far: 192373.06
If we subtract 2454 from 2800, we get 346.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

On to step 11:
409 can be fit into 3460 8 times, resulting in a remainder of 188.
Record the quotient 8 as the next digit in the result. 
Result so far: 192373.068
If we take 3272 away from 3460, we end up with 188.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1880, and continue the process.

On to step 12:
When dividing 1880 by 409, we get 4 with a remainder of 244.
Record the quotient 4 as the next digit in the result. 
Result so far: 192373.0684
If we take 1636 away from 1880, we end up with 244.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2440, and continue the process.

Let's proceed to step 13:
409 can be fit into 2440 5 times, resulting in a remainder of 395.
The number 5 becomes the next digit in our result. 
Result so far: 192373.06845
If we subtract 2045 from 2440, we get 395.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3950, and continue the process.

Going ahead to step 14:
409 can be fit into 3950 9 times, resulting in a remainder of 269.
Use 9 as the next digit of our solution. 
Result so far: 192373.068459
If we take 3681 away from 3950, we end up with 269.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2690, and continue the process.

Let's proceed to step 15:
When dividing 2690 by 409, we get 6 with a remainder of 236.
Write down 6 as next digit of the result. 
Result so far: 192373.0684596
If we subtract 2454 from 2690, we get 236.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2360, and continue the process.

On to step 16:
The number 409 fits into 2360 5 times, leaving a remainder of 315.
The next digit of our result is 5. 
Result so far: 192373.06845965
Subtracting 2045 from 2360 leaves us with 315.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3150, and continue the process.

Our division results in 192373.06845965 with a remaining 3.15e-07.