We look at the division of 405398 by 89 
The aim is to understand the frequency of 89 in 405398.

Going ahead to step 1:
The number 89 fits into 4 0 times, leaving a remainder of 4.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (0) from the dividend after 4, then repeat: 40 / 89

Step 2:
89 can be fit into 40 0 times, resulting in a remainder of 40.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 40 after subtracting 0 from 40.
Append the next digit (5) from the dividend to 40 and continue with: 405 / 89

Advancing to step 3:
When dividing 405 by 89, we get 4 with a remainder of 49.
Write down 4 as next digit of the result. 
Result so far: 4.0
Deduct 356 from 405 and we're left with 49.
Include the next digit (3) from the dividend after 49, then repeat: 493 / 89

On to step 4:
The number 89 fits into 493 5 times, leaving a remainder of 48.
Use 5 as the next digit of our solution. 
Result so far: 45.0
If we take 445 away from 493, we end up with 48.
Include the next digit (9) from the dividend after 48, then repeat: 489 / 89

Step 5:
If we divide 489 by 89, we get 5 and a remainder of 44.
Use 5 as the next digit of our solution. 
Result so far: 455.0
Deduct 445 from 489 and we're left with 44.
Append the next digit (8) from the dividend to 44 and continue with: 448 / 89

On to step 6:
448 divided by 89 is 5 with a remainder of 3.
Write down 5 as next digit of the result. 
Result so far: 4555.0
The remainder is 3 after subtracting 445 from 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Moving on to step 7:
30 divided by 89 is 0 with a remainder of 30.
Write down 0 as next digit of the result. 
Result so far: 4555.0
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.

Let's proceed to step 8:
When dividing 300 by 89, we get 3 with a remainder of 33.
Use 3 as the next digit of our solution. 
Result so far: 4555.03
Subtracting 267 from 300 leaves us 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.

Moving on to step 9:
89 goes into 330 3 times with a remainder of 63.
Record the quotient 3 as the next digit in the result. 
Result so far: 4555.033
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.

After the division, we end up with 4555.033 and a remainder of 0.0063.