We look at the division of 129940 by 67 
The aim is to understand the frequency of 67 in 129940.

On to step 1:
1 divided by 67 is 0 with a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 67

On to step 2:
67 goes into 12 0 times with a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 12 and we're left with 12.
Bring next digit (9) of the dividend behind the 12 and repeat the process: 129 / 67

Moving on to step 3:
129 divided by 67 is 1 with a remainder of 62.
The next digit of our result is 1. 
Result so far: 1.0
If we take 67 away from 129, we end up with 62.
Append the next digit (9) from the dividend to 62 and continue with: 629 / 67

Moving on to step 4:
67 goes into 629 9 times with a remainder of 26.
The next digit of our result is 9. 
Result so far: 19.0
If we subtract 603 from 629, we get 26.
Take the next digit (4) from the dividend and append it to 26, then repeat: 264 / 67

Let's proceed to step 5:
264 divided by 67 is 3 with a remainder of 63.
Write down 3 as next digit of the result. 
Result so far: 193.0
Subtract 201 from 264 to get 63.
Include the next digit (0) from the dividend after 63, then repeat: 630 / 67

On to step 6:
The number 67 fits into 630 9 times, leaving a remainder of 27.
Put 9 as the next digit of the answer. 
Result so far: 1939.0
Subtracting 603 from 630 leaves us with 27.
Since there are no more digits in the dividend, we add a zero to the remainder making it 270, and continue the process.

Step 7:
When dividing 270 by 67, we get 4 with a remainder of 2.
Use 4 as the next digit of our solution. 
Result so far: 1939.4
If we subtract 268 from 270, 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.

Going ahead to step 8:
The number 67 fits into 20 0 times, leaving a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 1939.4
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Advancing to step 9:
67 can be fit into 200 2 times, resulting in a remainder of 66.
Write down 2 as next digit of the result. 
Result so far: 1939.402
Subtracting 134 from 200 leaves us with 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

On to step 10:
If we divide 660 by 67, we get 9 and a remainder of 57.
Record the quotient 9 as the next digit in the result. 
Result so far: 1939.4029
The remainder is 57 after subtracting 603 from 660.
Since there are no more digits in the dividend, we add a zero to the remainder making it 570, and continue the process.

Step 11:
If we divide 570 by 67, we get 8 and a remainder of 34.
Use 8 as the next digit of our solution. 
Result so far: 1939.40298
The remainder is 34 after subtracting 536 from 570.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Moving on to step 12:
67 goes into 340 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 1939.402985
Subtracting 335 from 340 leaves us 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.

Moving on to step 13:
If we divide 50 by 67, we get 0 and a remainder of 50.
The next digit of our result is 0. 
Result so far: 1939.402985
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 14:
67 can be fit into 500 7 times, resulting in a remainder of 31.
Write down 7 as next digit of the result. 
Result so far: 1939.40298507
Deduct 469 from 500 and we're left with 31.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

The final outcome is 1939.40298507, with a leftover of 3.1e-08.