We're dividing 128639 by 89 
The aim is to understand the frequency of 89 in 128639.

On to step 1:
89 can be fit into 1 0 times, resulting in a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Append the next digit (2) from the dividend to 1 and continue with: 12 / 89

On to step 2:
The number 89 fits into 12 0 times, leaving a remainder of 12.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 89

Advancing to step 3:
If we divide 128 by 89, we get 1 and a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 89 from 128 leaves us with 39.
Grab the next digit (6) from the dividend, add it to 39, then carry on: 396 / 89

Moving on to step 4:
If we divide 396 by 89, we get 4 and a remainder of 40.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we take 356 away from 396, we end up with 40.
Take the next digit (3) from the dividend and append it to 40, then repeat: 403 / 89

Going ahead to step 5:
89 goes into 403 4 times with a remainder of 47.
The number 4 becomes the next digit in our result. 
Result so far: 144.0
Deduct 356 from 403 and we're left with 47.
Include the next digit (9) from the dividend after 47, then repeat: 479 / 89

Advancing to step 6:
89 can be fit into 479 5 times, resulting in a remainder of 34.
Record the quotient 5 as the next digit in the result. 
Result so far: 1445.0
If we subtract 445 from 479, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Let's proceed to step 7:
89 goes into 340 3 times with a remainder of 73.
Write down 3 as next digit of the result. 
Result so far: 1445.3
If we subtract 267 from 340, we get 73.
Since there are no more digits in the dividend, we add a zero to the remainder making it 730, and continue the process.

Step 8:
The number 89 fits into 730 8 times, leaving a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 1445.38
The remainder is 18 after subtracting 712 from 730.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 9:
If we divide 180 by 89, we get 2 and a remainder of 2.
Put 2 as the next digit of the answer. 
Result so far: 1445.382
Subtracting 178 from 180 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 10:
The number 89 fits into 20 0 times, leaving a remainder of 20.
Record the quotient 0 as the next digit in the result. 
Result so far: 1445.382
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
When dividing 200 by 89, we get 2 with a remainder of 22.
The number 2 becomes the next digit in our result. 
Result so far: 1445.38202
Deduct 178 from 200 and we're left with 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Let's proceed to step 12:
If we divide 220 by 89, we get 2 and a remainder of 42.
Use 2 as the next digit of our solution. 
Result so far: 1445.382022
The remainder is 42 after subtracting 178 from 220.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

The final result is 1445.382022 with a remainder of 4.2e-06.