We look at the division of 615923 by 67 
The aim is to understand the frequency of 67 in 615923.

Going ahead to step 1:
If we divide 6 by 67, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 67

Moving on to step 2:
67 can be fit into 61 0 times, resulting in a remainder of 61.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 61, we end up with 61.
Take the next digit (5) from the dividend and append it to 61, then repeat: 615 / 67

Step 3:
67 can be fit into 615 9 times, resulting in a remainder of 12.
Put 9 as the next digit of the answer. 
Result so far: 9.0
Deduct 603 from 615 and we're left with 12.
Include the next digit (9) from the dividend after 12, then repeat: 129 / 67

Advancing to step 4:
67 can be fit into 129 1 times, resulting in a remainder of 62.
Put 1 as the next digit of the answer. 
Result so far: 91.0
Subtracting 67 from 129 leaves us with 62.
Include the next digit (2) from the dividend after 62, then repeat: 622 / 67

Going ahead to step 5:
The number 67 fits into 622 9 times, leaving a remainder of 19.
The number 9 becomes the next digit in our result. 
Result so far: 919.0
Deduct 603 from 622 and we're left with 19.
Grab the next digit (3) from the dividend, add it to 19, then carry on: 193 / 67

Let's proceed to step 6:
67 goes into 193 2 times with a remainder of 59.
Write down 2 as next digit of the result. 
Result so far: 9192.0
If we take 134 away from 193, we end up with 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 7:
When dividing 590 by 67, we get 8 with a remainder of 54.
The next digit of our result is 8. 
Result so far: 9192.8
If we subtract 536 from 590, we get 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Advancing to step 8:
67 can be fit into 540 8 times, resulting in a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 9192.88
If we take 536 away from 540, 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.

The final outcome is 9192.88, with a leftover of 0.004.