We divide 1585261 by 810
The aim is to understand the frequency of 810 in 1585261.

Going ahead to step 1:
The number 810 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Bring next digit (5) of the dividend behind the 1 and repeat the process: 15 / 810

Let's proceed to step 2:
810 can be fit into 15 0 times, resulting in a remainder of 15.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Append the next digit (8) from the dividend to 15 and continue with: 158 / 810

Moving on to step 3:
If we divide 158 by 810, we get 0 and a remainder of 158.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 158 leaves us with 158.
Append the next digit (5) from the dividend to 158 and continue with: 1585 / 810

Step 4:
810 goes into 1585 1 times with a remainder of 775.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we take 810 away from 1585, we end up with 775.
Fetch the next digit (2) from the dividend, attach it to 775 and continue: 7752 / 810

Let's proceed to step 5:
The number 810 fits into 7752 9 times, leaving a remainder of 462.
Use 9 as the next digit of our solution. 
Result so far: 19.0
Subtract 7290 from 7752 to get 462.
Include the next digit (6) from the dividend after 462, then repeat: 4626 / 810

Step 6:
810 can be fit into 4626 5 times, resulting in a remainder of 576.
Put 5 as the next digit of the answer. 
Result so far: 195.0
Subtract 4050 from 4626 to get 576.
Take the next digit (1) from the dividend and append it to 576, then repeat: 5761 / 810

Moving on to step 7:
If we divide 5761 by 810, we get 7 and a remainder of 91.
Put 7 as the next digit of the answer. 
Result so far: 1957.0
If we take 5670 away from 5761, we end up with 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Let's proceed to step 8:
The number 810 fits into 910 1 times, leaving a remainder of 100.
Use 1 as the next digit of our solution. 
Result so far: 1957.1
Deduct 810 from 910 and we're left with 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

On to step 9:
When dividing 1000 by 810, we get 1 with a remainder of 190.
Put 1 as the next digit of the answer. 
Result so far: 1957.11
Deduct 810 from 1000 and we're left with 190.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1900, and continue the process.

The final outcome is 1957.11, with a leftover of 0.19.