21865261 ÷ 6 
The aim is to understand the frequency of 6 in 21865261.

Going ahead to step 1:
6 goes into 2 0 times with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 6

Let's proceed to step 2:
21 divided by 6 is 3 with a remainder of 3.
Write down 3 as next digit of the result. 
Result so far: 3.0
Subtracting 18 from 21 leaves us with 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 6

Let's proceed to step 3:
6 goes into 38 6 times with a remainder of 2.
Use 6 as the next digit of our solution. 
Result so far: 36.0
Subtract 36 from 38 to get 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 6

Moving on to step 4:
26 divided by 6 is 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 364.0
Subtracting 24 from 26 leaves us with 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 6

Moving on to step 5:
6 goes into 25 4 times with a remainder of 1.
Put 4 as the next digit of the answer. 
Result so far: 3644.0
If we take 24 away from 25, we end up with 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 6

Moving on to step 6:
If we divide 12 by 6, we get 2 and a remainder of 0.
Use 2 as the next digit of our solution. 
Result so far: 36442.0
Subtract 12 from 12 to get 0.
Fetch the next digit (6) from the dividend, attach it to 0 and continue: 6 / 6

Step 7:
6 can be fit into 6 1 times, resulting in a remainder of 0.
Put 1 as the next digit of the answer. 
Result so far: 364421.0
If we subtract 6 from 6, we get 0.
Fetch the next digit (1) from the dividend, attach it to 0 and continue: 1 / 6

Moving on to step 8:
When dividing 1 by 6, we get 0 with a remainder of 1.
Record the quotient 0 as the next digit in the result. 
Result so far: 3644210.0
The remainder is 1 after subtracting 0 from 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
The number 6 fits into 10 1 times, leaving a remainder of 4.
Put 1 as the next digit of the answer. 
Result so far: 3644210.1
If we take 6 away from 10, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 10:
The number 6 fits into 40 6 times, leaving a remainder of 4.
The next digit of our result is 6. 
Result so far: 3644210.16
Subtracting 36 from 40 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Going ahead to step 11:
6 goes into 40 6 times with a remainder of 4.
Use 6 as the next digit of our solution. 
Result so far: 3644210.166
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final outcome is 3644210.166, with a leftover of 0.0004.