We look at the division of 721143 by 89 
The aim is to understand the frequency of 89 in 721143.

Let's proceed to step 1:
If we divide 7 by 89, we get 0 and a remainder of 7.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Fetch the next digit (2) from the dividend, attach it to 7 and continue: 72 / 89

Step 2:
When dividing 72 by 89, we get 0 with a remainder of 72.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 72, we get 72.
Bring next digit (1) of the dividend behind the 72 and repeat the process: 721 / 89

Going ahead to step 3:
89 can be fit into 721 8 times, resulting in a remainder of 9.
Use 8 as the next digit of our solution. 
Result so far: 8.0
If we take 712 away from 721, we end up with 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 89

Going ahead to step 4:
89 goes into 91 1 times with a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 81.0
If we subtract 89 from 91, we get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 89

Moving on to step 5:
When dividing 24 by 89, we get 0 with a remainder of 24.
Write down 0 as next digit of the result. 
Result so far: 810.0
The remainder is 24 after subtracting 0 from 24.
Take the next digit (3) from the dividend and append it to 24, then repeat: 243 / 89

Going ahead to step 6:
89 can be fit into 243 2 times, resulting in a remainder of 65.
Write down 2 as next digit of the result. 
Result so far: 8102.0
If we subtract 178 from 243, we get 65.
Since there are no more digits in the dividend, we add a zero to the remainder making it 650, and continue the process.

On to step 7:
650 divided by 89 is 7 with a remainder of 27.
Put 7 as the next digit of the answer. 
Result so far: 8102.7
If we take 623 away from 650, we end up with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Advancing to step 8:
89 goes into 270 3 times with a remainder of 3.
Record the quotient 3 as the next digit in the result. 
Result so far: 8102.73
Subtracting 267 from 270 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 9:
If we divide 30 by 89, we get 0 and a remainder of 30.
Record the quotient 0 as the next digit in the result. 
Result so far: 8102.73
Subtracting 0 from 30 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Going ahead to step 10:
300 divided by 89 is 3 with a remainder of 33.
The number 3 becomes the next digit in our result. 
Result so far: 8102.7303
Deduct 267 from 300 and we're left with 33.
Since there are no more digits in the dividend, we add a zero to the remainder making it 330, and continue the process.

Advancing to step 11:
The number 89 fits into 330 3 times, leaving a remainder of 63.
Write down 3 as next digit of the result. 
Result so far: 8102.73033
Deduct 267 from 330 and we're left with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

The final result is 8102.73033 with a remainder of 6.3e-05.