Let's divide 81806829 by 689
The aim is to understand the frequency of 689 in 81806829.

Step 1:
The number 689 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 8 to get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 689

Going ahead to step 2:
81 divided by 689 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Take the next digit (8) from the dividend and append it to 81, then repeat: 818 / 689

Advancing to step 3:
689 can be fit into 818 1 times, resulting in a remainder of 129.
The next digit of our result is 1. 
Result so far: 1.0
Subtracting 689 from 818 leaves us with 129.
Grab the next digit (0) from the dividend, add it to 129, then carry on: 1290 / 689

Advancing to step 4:
689 can be fit into 1290 1 times, resulting in a remainder of 601.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
The remainder is 601 after subtracting 689 from 1290.
Grab the next digit (6) from the dividend, add it to 601, then carry on: 6016 / 689

Step 5:
689 can be fit into 6016 8 times, resulting in a remainder of 504.
The number 8 becomes the next digit in our result. 
Result so far: 118.0
Subtract 5512 from 6016 to get 504.
Take the next digit (8) from the dividend and append it to 504, then repeat: 5048 / 689

Moving on to step 6:
If we divide 5048 by 689, we get 7 and a remainder of 225.
Write down 7 as next digit of the result. 
Result so far: 1187.0
Deduct 4823 from 5048 and we're left with 225.
Fetch the next digit (2) from the dividend, attach it to 225 and continue: 2252 / 689

Moving on to step 7:
The number 689 fits into 2252 3 times, leaving a remainder of 185.
The next digit of our result is 3. 
Result so far: 11873.0
Deduct 2067 from 2252 and we're left with 185.
Grab the next digit (9) from the dividend, add it to 185, then carry on: 1859 / 689

Advancing to step 8:
The number 689 fits into 1859 2 times, leaving a remainder of 481.
Put 2 as the next digit of the answer. 
Result so far: 118732.0
If we take 1378 away from 1859, we end up with 481.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4810, and continue the process.

Let's proceed to step 9:
689 can be fit into 4810 6 times, resulting in a remainder of 676.
The number 6 becomes the next digit in our result. 
Result so far: 118732.6
Deduct 4134 from 4810 and we're left with 676.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6760, and continue the process.

Going ahead to step 10:
6760 divided by 689 is 9 with a remainder of 559.
Record the quotient 9 as the next digit in the result. 
Result so far: 118732.69
Subtracting 6201 from 6760 leaves us with 559.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5590, and continue the process.

Going ahead to step 11:
When dividing 5590 by 689, we get 8 with a remainder of 78.
The number 8 becomes the next digit in our result. 
Result so far: 118732.698
Deduct 5512 from 5590 and we're left with 78.
Since there are no more digits in the dividend, we add a zero to the remainder making it 780, and continue the process.

Advancing to step 12:
The number 689 fits into 780 1 times, leaving a remainder of 91.
Write down 1 as next digit of the result. 
Result so far: 118732.6981
Subtract 689 from 780 to get 91.
Since there are no more digits in the dividend, we add a zero to the remainder making it 910, and continue the process.

Going ahead to step 13:
689 can be fit into 910 1 times, resulting in a remainder of 221.
The number 1 becomes the next digit in our result. 
Result so far: 118732.69811
Subtracting 689 from 910 leaves us with 221.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2210, and continue the process.

The final outcome is 118732.69811, with a leftover of 0.000221.