We look at the division of 81647019 by 306 
The aim is to understand the frequency of 306 in 81647019.

Going ahead to step 1:
8 divided by 306 is 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Include the next digit (1) from the dividend after 8, then repeat: 81 / 306

Going ahead to step 2:
When dividing 81 by 306, we get 0 with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 81 to get 81.
Include the next digit (6) from the dividend after 81, then repeat: 816 / 306

Going ahead to step 3:
When dividing 816 by 306, we get 2 with a remainder of 204.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 612 from 816 leaves us with 204.
Fetch the next digit (4) from the dividend, attach it to 204 and continue: 2044 / 306

Going ahead to step 4:
If we divide 2044 by 306, we get 6 and a remainder of 208.
The number 6 becomes the next digit in our result. 
Result so far: 26.0
Deduct 1836 from 2044 and we're left with 208.
Include the next digit (7) from the dividend after 208, then repeat: 2087 / 306

On to step 5:
If we divide 2087 by 306, we get 6 and a remainder of 251.
Use 6 as the next digit of our solution. 
Result so far: 266.0
If we take 1836 away from 2087, we end up with 251.
Bring next digit (0) of the dividend behind the 251 and repeat the process: 2510 / 306

Moving on to step 6:
306 goes into 2510 8 times with a remainder of 62.
The next digit of our result is 8. 
Result so far: 2668.0
Subtracting 2448 from 2510 leaves us with 62.
Bring next digit (1) of the dividend behind the 62 and repeat the process: 621 / 306

Going ahead to step 7:
621 divided by 306 is 2 with a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 26682.0
The remainder is 9 after subtracting 612 from 621.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 306

Step 8:
If we divide 99 by 306, we get 0 and a remainder of 99.
Write down 0 as next digit of the result. 
Result so far: 266820.0
Subtracting 0 from 99 leaves us with 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 990, and continue the process.

Let's proceed to step 9:
When dividing 990 by 306, we get 3 with a remainder of 72.
Record the quotient 3 as the next digit in the result. 
Result so far: 266820.3
If we take 918 away from 990, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 10:
306 goes into 720 2 times with a remainder of 108.
The number 2 becomes the next digit in our result. 
Result so far: 266820.32
Deduct 612 from 720 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Let's proceed to step 11:
306 goes into 1080 3 times with a remainder of 162.
The next digit of our result is 3. 
Result so far: 266820.323
Subtract 918 from 1080 to get 162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1620, and continue the process.

Step 12:
If we divide 1620 by 306, we get 5 and a remainder of 90.
Record the quotient 5 as the next digit in the result. 
Result so far: 266820.3235
Subtracting 1530 from 1620 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Going ahead to step 13:
The number 306 fits into 900 2 times, leaving a remainder of 288.
The number 2 becomes the next digit in our result. 
Result so far: 266820.32352
The remainder is 288 after subtracting 612 from 900.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2880, and continue the process.

Advancing to step 14:
306 goes into 2880 9 times with a remainder of 126.
Record the quotient 9 as the next digit in the result. 
Result so far: 266820.323529
The remainder is 126 after subtracting 2754 from 2880.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

Step 15:
When dividing 1260 by 306, we get 4 with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 266820.3235294
Subtracting 1224 from 1260 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Going ahead to step 16:
If we divide 360 by 306, we get 1 and a remainder of 54.
The next digit of our result is 1. 
Result so far: 266820.32352941
Subtracting 306 from 360 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

The final outcome is 266820.32352941, with a leftover of 5.4e-08.