We look at the division of 80613167 by 409 
The aim is to understand the frequency of 409 in 80613167.

Let's proceed to step 1:
8 divided by 409 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 409

Let's proceed to step 2:
409 can be fit into 80 0 times, resulting in a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Append the next digit (6) from the dividend to 80 and continue with: 806 / 409

Let's proceed to step 3:
409 can be fit into 806 1 times, resulting in a remainder of 397.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 409 from 806 to get 397.
Fetch the next digit (1) from the dividend, attach it to 397 and continue: 3971 / 409

Going ahead to step 4:
3971 divided by 409 is 9 with a remainder of 290.
The next digit of our result is 9. 
Result so far: 19.0
The remainder is 290 after subtracting 3681 from 3971.
Grab the next digit (3) from the dividend, add it to 290, then carry on: 2903 / 409

Step 5:
When dividing 2903 by 409, we get 7 with a remainder of 40.
The number 7 becomes the next digit in our result. 
Result so far: 197.0
If we take 2863 away from 2903, we end up with 40.
Fetch the next digit (1) from the dividend, attach it to 40 and continue: 401 / 409

Going ahead to step 6:
401 divided by 409 is 0 with a remainder of 401.
The next digit of our result is 0. 
Result so far: 1970.0
Deduct 0 from 401 and we're left with 401.
Grab the next digit (6) from the dividend, add it to 401, then carry on: 4016 / 409

Advancing to step 7:
If we divide 4016 by 409, we get 9 and a remainder of 335.
The next digit of our result is 9. 
Result so far: 19709.0
The remainder is 335 after subtracting 3681 from 4016.
Include the next digit (7) from the dividend after 335, then repeat: 3357 / 409

On to step 8:
When dividing 3357 by 409, we get 8 with a remainder of 85.
Write down 8 as next digit of the result. 
Result so far: 197098.0
Deduct 3272 from 3357 and we're left with 85.
Since there are no more digits in the dividend, we add a zero to the remainder making it 850, and continue the process.

On to step 9:
When dividing 850 by 409, we get 2 with a remainder of 32.
Put 2 as the next digit of the answer. 
Result so far: 197098.2
Deduct 818 from 850 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 10:
409 can be fit into 320 0 times, resulting in a remainder of 320.
Write down 0 as next digit of the result. 
Result so far: 197098.2
Subtract 0 from 320 to get 320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3200, and continue the process.

On to step 11:
The number 409 fits into 3200 7 times, leaving a remainder of 337.
Use 7 as the next digit of our solution. 
Result so far: 197098.207
Deduct 2863 from 3200 and we're left with 337.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3370, and continue the process.

Let's proceed to step 12:
The number 409 fits into 3370 8 times, leaving a remainder of 98.
The next digit of our result is 8. 
Result so far: 197098.2078
Subtract 3272 from 3370 to get 98.
Since there are no more digits in the dividend, we add a zero to the remainder making it 980, and continue the process.

Let's proceed to step 13:
The number 409 fits into 980 2 times, leaving a remainder of 162.
Put 2 as the next digit of the answer. 
Result so far: 197098.20782
The remainder is 162 after subtracting 818 from 980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Let's proceed to step 14:
409 can be fit into 1620 3 times, resulting in a remainder of 393.
The number 3 becomes the next digit in our result. 
Result so far: 197098.207823
If we subtract 1227 from 1620, we get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Going ahead to step 15:
When dividing 3930 by 409, we get 9 with a remainder of 249.
Put 9 as the next digit of the answer. 
Result so far: 197098.2078239
The remainder is 249 after subtracting 3681 from 3930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2490, and continue the process.

Going ahead to step 16:
2490 divided by 409 is 6 with a remainder of 36.
Record the quotient 6 as the next digit in the result. 
Result so far: 197098.20782396
Subtracting 2454 from 2490 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

After the division, we end up with 197098.20782396 and a remainder of 3.6e-08.