81576890 ÷ 6 
The aim is to understand the frequency of 6 in 81576890.

Step 1:
When dividing 8 by 6, we get 1 with a remainder of 2.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 2 after subtracting 6 from 8.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 6

Let's proceed to step 2:
6 goes into 21 3 times with a remainder of 3.
Put 3 as the next digit of the answer. 
Result so far: 13.0
Subtract 18 from 21 to get 3.
Include the next digit (5) from the dividend after 3, then repeat: 35 / 6

Step 3:
If we divide 35 by 6, we get 5 and a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 135.0
If we take 30 away from 35, we end up with 5.
Take the next digit (7) from the dividend and append it to 5, then repeat: 57 / 6

Going ahead to step 4:
6 can be fit into 57 9 times, resulting in a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 1359.0
The remainder is 3 after subtracting 54 from 57.
Fetch the next digit (6) from the dividend, attach it to 3 and continue: 36 / 6

Advancing to step 5:
36 divided by 6 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 13596.0
Subtract 36 from 36 to get 0.
Append the next digit (8) from the dividend to 0 and continue with: 8 / 6

Advancing to step 6:
When dividing 8 by 6, we get 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 135961.0
Subtract 6 from 8 to get 2.
Bring next digit (9) of the dividend behind the 2 and repeat the process: 29 / 6

On to step 7:
If we divide 29 by 6, we get 4 and a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 1359614.0
Subtracting 24 from 29 leaves us with 5.
Take the next digit (0) from the dividend and append it to 5, then repeat: 50 / 6

Going ahead to step 8:
When dividing 50 by 6, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 13596148.0
Subtracting 48 from 50 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.

Advancing to step 9:
The number 6 fits into 20 3 times, leaving a remainder of 2.
Put 3 as the next digit of the answer. 
Result so far: 13596148.3
If we subtract 18 from 20, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Moving on to step 10:
The number 6 fits into 20 3 times, leaving a remainder of 2.
Record the quotient 3 as the next digit in the result. 
Result so far: 13596148.33
Deduct 18 from 20 and we're left 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.

In conclusion, the division gives 13596148.33 with a balance of 0.002.