8451658 divided by 989 
The aim is to understand the frequency of 989 in 8451658.

Step 1:
When dividing 8 by 989, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 989

Let's proceed to step 2:
The number 989 fits into 84 0 times, leaving a remainder of 84.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 84 after subtracting 0 from 84.
Append the next digit (5) from the dividend to 84 and continue with: 845 / 989

Moving on to step 3:
When dividing 845 by 989, we get 0 with a remainder of 845.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 845, we get 845.
Bring next digit (1) of the dividend behind the 845 and repeat the process: 8451 / 989

Let's proceed to step 4:
If we divide 8451 by 989, we get 8 and a remainder of 539.
The next digit of our result is 8. 
Result so far: 8.0
Subtracting 7912 from 8451 leaves us with 539.
Append the next digit (6) from the dividend to 539 and continue with: 5396 / 989

Moving on to step 5:
When dividing 5396 by 989, we get 5 with a remainder of 451.
Record the quotient 5 as the next digit in the result. 
Result so far: 85.0
The remainder is 451 after subtracting 4945 from 5396.
Include the next digit (5) from the dividend after 451, then repeat: 4515 / 989

Moving on to step 6:
If we divide 4515 by 989, we get 4 and a remainder of 559.
The next digit of our result is 4. 
Result so far: 854.0
Subtracting 3956 from 4515 leaves us with 559.
Append the next digit (8) from the dividend to 559 and continue with: 5598 / 989

On to step 7:
989 goes into 5598 5 times with a remainder of 653.
Record the quotient 5 as the next digit in the result. 
Result so far: 8545.0
If we take 4945 away from 5598, we end up with 653.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6530, and continue the process.

Going ahead to step 8:
If we divide 6530 by 989, we get 6 and a remainder of 596.
Record the quotient 6 as the next digit in the result. 
Result so far: 8545.6
Subtract 5934 from 6530 to get 596.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5960, and continue the process.

Let's proceed to step 9:
If we divide 5960 by 989, we get 6 and a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 8545.66
Deduct 5934 from 5960 and we're left with 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Our division results in 8545.66 with a remaining 0.026.