91666766 divided by 489 
The aim is to understand the frequency of 489 in 91666766.

Step 1:
489 goes into 9 0 times with a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 489

Going ahead to step 2:
When dividing 91 by 489, we get 0 with a remainder of 91.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Include the next digit (6) from the dividend after 91, then repeat: 916 / 489

On to step 3:
If we divide 916 by 489, we get 1 and a remainder of 427.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 427 after subtracting 489 from 916.
Include the next digit (6) from the dividend after 427, then repeat: 4276 / 489

Moving on to step 4:
If we divide 4276 by 489, we get 8 and a remainder of 364.
Record the quotient 8 as the next digit in the result. 
Result so far: 18.0
If we take 3912 away from 4276, we end up with 364.
Fetch the next digit (6) from the dividend, attach it to 364 and continue: 3646 / 489

Let's proceed to step 5:
The number 489 fits into 3646 7 times, leaving a remainder of 223.
Use 7 as the next digit of our solution. 
Result so far: 187.0
The remainder is 223 after subtracting 3423 from 3646.
Bring next digit (7) of the dividend behind the 223 and repeat the process: 2237 / 489

Step 6:
489 can be fit into 2237 4 times, resulting in a remainder of 281.
Put 4 as the next digit of the answer. 
Result so far: 1874.0
Deduct 1956 from 2237 and we're left with 281.
Bring next digit (6) of the dividend behind the 281 and repeat the process: 2816 / 489

Advancing to step 7:
2816 divided by 489 is 5 with a remainder of 371.
Use 5 as the next digit of our solution. 
Result so far: 18745.0
If we subtract 2445 from 2816, we get 371.
Grab the next digit (6) from the dividend, add it to 371, then carry on: 3716 / 489

Let's proceed to step 8:
When dividing 3716 by 489, we get 7 with a remainder of 293.
Write down 7 as next digit of the result. 
Result so far: 187457.0
Subtract 3423 from 3716 to get 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2930, and continue the process.

Moving on to step 9:
489 can be fit into 2930 5 times, resulting in a remainder of 485.
Write down 5 as next digit of the result. 
Result so far: 187457.5
The remainder is 485 after subtracting 2445 from 2930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Advancing to step 10:
4850 divided by 489 is 9 with a remainder of 449.
Record the quotient 9 as the next digit in the result. 
Result so far: 187457.59
The remainder is 449 after subtracting 4401 from 4850.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4490, and continue the process.

Going ahead to step 11:
489 goes into 4490 9 times with a remainder of 89.
Put 9 as the next digit of the answer. 
Result so far: 187457.599
The remainder is 89 after subtracting 4401 from 4490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 890, and continue the process.

The final outcome is 187457.599, with a leftover of 0.0089.