Let's divide 25423393 by 809
The aim is to understand the frequency of 809 in 25423393.

Going ahead to step 1:
If we divide 2 by 809, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Bring next digit (5) of the dividend behind the 2 and repeat the process: 25 / 809

Going ahead to step 2:
If we divide 25 by 809, we get 0 and a remainder of 25.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 25 and we're left with 25.
Fetch the next digit (4) from the dividend, attach it to 25 and continue: 254 / 809

Going ahead to step 3:
809 goes into 254 0 times with a remainder of 254.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 254 after subtracting 0 from 254.
Fetch the next digit (2) from the dividend, attach it to 254 and continue: 2542 / 809

Advancing to step 4:
809 can be fit into 2542 3 times, resulting in a remainder of 115.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtracting 2427 from 2542 leaves us with 115.
Take the next digit (3) from the dividend and append it to 115, then repeat: 1153 / 809

Let's proceed to step 5:
The number 809 fits into 1153 1 times, leaving a remainder of 344.
The number 1 becomes the next digit in our result. 
Result so far: 31.0
Subtract 809 from 1153 to get 344.
Fetch the next digit (3) from the dividend, attach it to 344 and continue: 3443 / 809

Going ahead to step 6:
When dividing 3443 by 809, we get 4 with a remainder of 207.
Record the quotient 4 as the next digit in the result. 
Result so far: 314.0
The remainder is 207 after subtracting 3236 from 3443.
Take the next digit (9) from the dividend and append it to 207, then repeat: 2079 / 809

Going ahead to step 7:
809 goes into 2079 2 times with a remainder of 461.
The number 2 becomes the next digit in our result. 
Result so far: 3142.0
If we take 1618 away from 2079, we end up with 461.
Grab the next digit (3) from the dividend, add it to 461, then carry on: 4613 / 809

On to step 8:
If we divide 4613 by 809, we get 5 and a remainder of 568.
Use 5 as the next digit of our solution. 
Result so far: 31425.0
Subtracting 4045 from 4613 leaves us with 568.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5680, and continue the process.

Let's proceed to step 9:
When dividing 5680 by 809, we get 7 with a remainder of 17.
Record the quotient 7 as the next digit in the result. 
Result so far: 31425.7
Subtract 5663 from 5680 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 10:
When dividing 170 by 809, we get 0 with a remainder of 170.
Use 0 as the next digit of our solution. 
Result so far: 31425.7
Subtract 0 from 170 to get 170.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1700, and continue the process.

Advancing to step 11:
If we divide 1700 by 809, we get 2 and a remainder of 82.
Write down 2 as next digit of the result. 
Result so far: 31425.702
Subtracting 1618 from 1700 leaves us with 82.
Since there are no more digits in the dividend, we add a zero to the remainder making it 820, and continue the process.

Advancing to step 12:
If we divide 820 by 809, we get 1 and a remainder of 11.
Record the quotient 1 as the next digit in the result. 
Result so far: 31425.7021
If we take 809 away from 820, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 13:
110 divided by 809 is 0 with a remainder of 110.
Use 0 as the next digit of our solution. 
Result so far: 31425.7021
If we subtract 0 from 110, we get 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 14:
809 can be fit into 1100 1 times, resulting in a remainder of 291.
The number 1 becomes the next digit in our result. 
Result so far: 31425.702101
Subtract 809 from 1100 to get 291.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2910, and continue the process.

On to step 15:
When dividing 2910 by 809, we get 3 with a remainder of 483.
Write down 3 as next digit of the result. 
Result so far: 31425.7021013
Subtracting 2427 from 2910 leaves us with 483.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4830, and continue the process.

On to step 16:
The number 809 fits into 4830 5 times, leaving a remainder of 785.
The next digit of our result is 5. 
Result so far: 31425.70210135
The remainder is 785 after subtracting 4045 from 4830.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7850, and continue the process.

The final result is 31425.70210135 with a remainder of 7.85e-07.