818873 ÷ 89 
The aim is to understand the frequency of 89 in 818873.

Let's proceed to step 1:
89 goes into 8 0 times with a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 89

Moving on to step 2:
When dividing 81 by 89, we get 0 with a remainder of 81.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 81, we end up with 81.
Grab the next digit (8) from the dividend, add it to 81, then carry on: 818 / 89

Moving on to step 3:
If we divide 818 by 89, we get 9 and a remainder of 17.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 801 from 818 leaves us with 17.
Include the next digit (8) from the dividend after 17, then repeat: 178 / 89

Step 4:
89 can be fit into 178 2 times, resulting in a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 92.0
Subtract 178 from 178 to get 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 89

Moving on to step 5:
When dividing 7 by 89, we get 0 with a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 920.0
Subtract 0 from 7 to get 7.
Fetch the next digit (3) from the dividend, attach it to 7 and continue: 73 / 89

Moving on to step 6:
The number 89 fits into 73 0 times, leaving a remainder of 73.
The number 0 becomes the next digit in our result. 
Result so far: 9200.0
If we take 0 away from 73, we end up with 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 7:
89 can be fit into 730 8 times, resulting in a remainder of 18.
Record the quotient 8 as the next digit in the result. 
Result so far: 9200.8
If we subtract 712 from 730, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 8:
89 goes into 180 2 times with a remainder of 2.
Write down 2 as next digit of the result. 
Result so far: 9200.82
If we take 178 away from 180, we end up 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.

Let's proceed to step 9:
The number 89 fits into 20 0 times, leaving a remainder of 20.
Put 0 as the next digit of the answer. 
Result so far: 9200.82
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.

Let's proceed to step 10:
When dividing 200 by 89, we get 2 with a remainder of 22.
Put 2 as the next digit of the answer. 
Result so far: 9200.8202
If we subtract 178 from 200, we get 22.
Since there are no more digits in the dividend, we add a zero to the remainder making it 220, and continue the process.

Step 11:
If we divide 220 by 89, we get 2 and a remainder of 42.
The next digit of our result is 2. 
Result so far: 9200.82022
If we take 178 away from 220, we end up with 42.
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 outcome is 9200.82022, with a leftover of 4.2e-05.