81080621 divided by 289 
The aim is to understand the frequency of 289 in 81080621.

Moving on to step 1:
289 goes into 8 0 times with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 289

Moving on to step 2:
If we divide 81 by 289, we get 0 and a remainder of 81.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Fetch the next digit (0) from the dividend, attach it to 81 and continue: 810 / 289

Step 3:
If we divide 810 by 289, we get 2 and a remainder of 232.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 578 from 810 leaves us with 232.
Take the next digit (8) from the dividend and append it to 232, then repeat: 2328 / 289

Advancing to step 4:
289 can be fit into 2328 8 times, resulting in a remainder of 16.
Record the quotient 8 as the next digit in the result. 
Result so far: 28.0
The remainder is 16 after subtracting 2312 from 2328.
Bring next digit (0) of the dividend behind the 16 and repeat the process: 160 / 289

Let's proceed to step 5:
160 divided by 289 is 0 with a remainder of 160.
The number 0 becomes the next digit in our result. 
Result so far: 280.0
If we subtract 0 from 160, we get 160.
Bring next digit (6) of the dividend behind the 160 and repeat the process: 1606 / 289

Going ahead to step 6:
The number 289 fits into 1606 5 times, leaving a remainder of 161.
Use 5 as the next digit of our solution. 
Result so far: 2805.0
The remainder is 161 after subtracting 1445 from 1606.
Grab the next digit (2) from the dividend, add it to 161, then carry on: 1612 / 289

On to step 7:
If we divide 1612 by 289, we get 5 and a remainder of 167.
Record the quotient 5 as the next digit in the result. 
Result so far: 28055.0
If we take 1445 away from 1612, we end up with 167.
Bring next digit (1) of the dividend behind the 167 and repeat the process: 1671 / 289

On to step 8:
1671 divided by 289 is 5 with a remainder of 226.
Put 5 as the next digit of the answer. 
Result so far: 280555.0
Subtracting 1445 from 1671 leaves us with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Let's proceed to step 9:
If we divide 2260 by 289, we get 7 and a remainder of 237.
The next digit of our result is 7. 
Result so far: 280555.7
Subtract 2023 from 2260 to get 237.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2370, and continue the process.

On to step 10:
2370 divided by 289 is 8 with a remainder of 58.
The number 8 becomes the next digit in our result. 
Result so far: 280555.78
Subtract 2312 from 2370 to get 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Advancing to step 11:
If we divide 580 by 289, we get 2 and a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 280555.782
The remainder is 2 after subtracting 578 from 580.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 12:
If we divide 20 by 289, we get 0 and a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 280555.782
The remainder is 20 after subtracting 0 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 13:
200 divided by 289 is 0 with a remainder of 200.
Write down 0 as next digit of the result. 
Result so far: 280555.782
If we take 0 away from 200, we end up with 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

After the division, we end up with 280555.782 and a remainder of 0.0002.