We look at the division of 490667 by 81 
The aim is to understand the frequency of 81 in 490667.

Step 1:
81 goes into 4 0 times with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Include the next digit (9) from the dividend after 4, then repeat: 49 / 81

Moving on to step 2:
When dividing 49 by 81, we get 0 with a remainder of 49.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we take 0 away from 49, we end up with 49.
Fetch the next digit (0) from the dividend, attach it to 49 and continue: 490 / 81

Let's proceed to step 3:
81 can be fit into 490 6 times, resulting in a remainder of 4.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 4 after subtracting 486 from 490.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 81

Advancing to step 4:
81 can be fit into 46 0 times, resulting in a remainder of 46.
The next digit of our result is 0. 
Result so far: 60.0
Subtracting 0 from 46 leaves us with 46.
Fetch the next digit (6) from the dividend, attach it to 46 and continue: 466 / 81

Moving on to step 5:
If we divide 466 by 81, we get 5 and a remainder of 61.
Put 5 as the next digit of the answer. 
Result so far: 605.0
Deduct 405 from 466 and we're left with 61.
Take the next digit (7) from the dividend and append it to 61, then repeat: 617 / 81

Going ahead to step 6:
617 divided by 81 is 7 with a remainder of 50.
Use 7 as the next digit of our solution. 
Result so far: 6057.0
The remainder is 50 after subtracting 567 from 617.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 7:
81 goes into 500 6 times with a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 6057.6
Subtract 486 from 500 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 8:
The number 81 fits into 140 1 times, leaving a remainder of 59.
The number 1 becomes the next digit in our result. 
Result so far: 6057.61
Subtracting 81 from 140 leaves us with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

Going ahead to step 9:
590 divided by 81 is 7 with a remainder of 23.
The number 7 becomes the next digit in our result. 
Result so far: 6057.617
If we subtract 567 from 590, we get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Let's proceed to step 10:
230 divided by 81 is 2 with a remainder of 68.
Write down 2 as next digit of the result. 
Result so far: 6057.6172
If we take 162 away from 230, we end up with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 11:
When dividing 680 by 81, we get 8 with a remainder of 32.
Use 8 as the next digit of our solution. 
Result so far: 6057.61728
Subtracting 648 from 680 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Going ahead to step 12:
The number 81 fits into 320 3 times, leaving a remainder of 77.
The number 3 becomes the next digit in our result. 
Result so far: 6057.617283
Deduct 243 from 320 and we're left with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 13:
The number 81 fits into 770 9 times, leaving a remainder of 41.
Use 9 as the next digit of our solution. 
Result so far: 6057.6172839
Subtracting 729 from 770 leaves us with 41.
Since there are no more digits in the dividend, we add a zero to the remainder making it 410, and continue the process.

Step 14:
If we divide 410 by 81, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 6057.61728395
Deduct 405 from 410 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The quotient of the division is 6057.61728395, and the remainder is 5e-09.