85936609 divided by 809 
The aim is to understand the frequency of 809 in 85936609.

Let's proceed to step 1:
8 divided by 809 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
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 / 809

On to step 2:
85 divided by 809 is 0 with a remainder of 85.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 85 leaves us with 85.
Grab the next digit (9) from the dividend, add it to 85, then carry on: 859 / 809

Step 3:
When dividing 859 by 809, we get 1 with a remainder of 50.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 809 from 859 and we're left with 50.
Bring next digit (3) of the dividend behind the 50 and repeat the process: 503 / 809

Step 4:
The number 809 fits into 503 0 times, leaving a remainder of 503.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Deduct 0 from 503 and we're left with 503.
Fetch the next digit (6) from the dividend, attach it to 503 and continue: 5036 / 809

Moving on to step 5:
5036 divided by 809 is 6 with a remainder of 182.
Use 6 as the next digit of our solution. 
Result so far: 106.0
If we take 4854 away from 5036, we end up with 182.
Bring next digit (6) of the dividend behind the 182 and repeat the process: 1826 / 809

Going ahead to step 6:
809 can be fit into 1826 2 times, resulting in a remainder of 208.
Use 2 as the next digit of our solution. 
Result so far: 1062.0
The remainder is 208 after subtracting 1618 from 1826.
Fetch the next digit (0) from the dividend, attach it to 208 and continue: 2080 / 809

Step 7:
809 can be fit into 2080 2 times, resulting in a remainder of 462.
The number 2 becomes the next digit in our result. 
Result so far: 10622.0
If we take 1618 away from 2080, we end up with 462.
Fetch the next digit (9) from the dividend, attach it to 462 and continue: 4629 / 809

Advancing to step 8:
4629 divided by 809 is 5 with a remainder of 584.
The number 5 becomes the next digit in our result. 
Result so far: 106225.0
If we take 4045 away from 4629, we end up with 584.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5840, and continue the process.

Going ahead to step 9:
When dividing 5840 by 809, we get 7 with a remainder of 177.
Use 7 as the next digit of our solution. 
Result so far: 106225.7
If we take 5663 away from 5840, we end up with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Step 10:
1770 divided by 809 is 2 with a remainder of 152.
Record the quotient 2 as the next digit in the result. 
Result so far: 106225.72
Deduct 1618 from 1770 and we're left with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Let's proceed to step 11:
When dividing 1520 by 809, we get 1 with a remainder of 711.
Put 1 as the next digit of the answer. 
Result so far: 106225.721
If we subtract 809 from 1520, we get 711.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7110, and continue the process.

Step 12:
7110 divided by 809 is 8 with a remainder of 638.
Use 8 as the next digit of our solution. 
Result so far: 106225.7218
The remainder is 638 after subtracting 6472 from 7110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6380, and continue the process.

Going ahead to step 13:
809 goes into 6380 7 times with a remainder of 717.
Record the quotient 7 as the next digit in the result. 
Result so far: 106225.72187
If we take 5663 away from 6380, we end up with 717.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7170, and continue the process.

Going ahead to step 14:
If we divide 7170 by 809, we get 8 and a remainder of 698.
Put 8 as the next digit of the answer. 
Result so far: 106225.721878
Subtract 6472 from 7170 to get 698.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6980, and continue the process.

Going ahead to step 15:
809 goes into 6980 8 times with a remainder of 508.
Record the quotient 8 as the next digit in the result. 
Result so far: 106225.7218788
If we take 6472 away from 6980, we end up with 508.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5080, and continue the process.

The final result is 106225.7218788 with a remainder of 5.08e-06.