We're dividing 20691258 by 306 
The aim is to understand the frequency of 306 in 20691258.

Let's proceed to step 1:
306 can be fit into 2 0 times, resulting in a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 306

Moving on to step 2:
20 divided by 306 is 0 with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Take the next digit (6) from the dividend and append it to 20, then repeat: 206 / 306

On to step 3:
306 can be fit into 206 0 times, resulting in a remainder of 206.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 206 and we're left with 206.
Bring next digit (9) of the dividend behind the 206 and repeat the process: 2069 / 306

Let's proceed to step 4:
306 goes into 2069 6 times with a remainder of 233.
Record the quotient 6 as the next digit in the result. 
Result so far: 6.0
The remainder is 233 after subtracting 1836 from 2069.
Fetch the next digit (1) from the dividend, attach it to 233 and continue: 2331 / 306

On to step 5:
If we divide 2331 by 306, we get 7 and a remainder of 189.
The next digit of our result is 7. 
Result so far: 67.0
If we subtract 2142 from 2331, we get 189.
Include the next digit (2) from the dividend after 189, then repeat: 1892 / 306

Moving on to step 6:
306 can be fit into 1892 6 times, resulting in a remainder of 56.
Use 6 as the next digit of our solution. 
Result so far: 676.0
The remainder is 56 after subtracting 1836 from 1892.
Append the next digit (5) from the dividend to 56 and continue with: 565 / 306

Let's proceed to step 7:
565 divided by 306 is 1 with a remainder of 259.
Write down 1 as next digit of the result. 
Result so far: 6761.0
If we take 306 away from 565, we end up with 259.
Include the next digit (8) from the dividend after 259, then repeat: 2598 / 306

Moving on to step 8:
306 goes into 2598 8 times with a remainder of 150.
Use 8 as the next digit of our solution. 
Result so far: 67618.0
Deduct 2448 from 2598 and we're left with 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1500, and continue the process.

Advancing to step 9:
306 goes into 1500 4 times with a remainder of 276.
The next digit of our result is 4. 
Result so far: 67618.4
Subtract 1224 from 1500 to get 276.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2760, and continue the process.

Let's proceed to step 10:
The number 306 fits into 2760 9 times, leaving a remainder of 6.
The number 9 becomes the next digit in our result. 
Result so far: 67618.49
The remainder is 6 after subtracting 2754 from 2760.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
60 divided by 306 is 0 with a remainder of 60.
Write down 0 as next digit of the result. 
Result so far: 67618.49
If we take 0 away from 60, we end up with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Step 12:
When dividing 600 by 306, we get 1 with a remainder of 294.
The next digit of our result is 1. 
Result so far: 67618.4901
Subtracting 306 from 600 leaves us with 294.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2940, and continue the process.

Step 13:
The number 306 fits into 2940 9 times, leaving a remainder of 186.
Use 9 as the next digit of our solution. 
Result so far: 67618.49019
The remainder is 186 after subtracting 2754 from 2940.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1860, and continue the process.

Going ahead to step 14:
306 goes into 1860 6 times with a remainder of 24.
Put 6 as the next digit of the answer. 
Result so far: 67618.490196
Subtracting 1836 from 1860 leaves us with 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

On to step 15:
306 can be fit into 240 0 times, resulting in a remainder of 240.
Use 0 as the next digit of our solution. 
Result so far: 67618.490196
If we subtract 0 from 240, we get 240.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2400, and continue the process.

On to step 16:
2400 divided by 306 is 7 with a remainder of 258.
Record the quotient 7 as the next digit in the result. 
Result so far: 67618.49019607
Deduct 2142 from 2400 and we're left with 258.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

After the division, we end up with 67618.49019607 and a remainder of 2.58e-07.