We look at the division of 16390871 by 67 
The aim is to understand the frequency of 67 in 16390871.

Step 1:
The number 67 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Bring next digit (6) of the dividend behind the 1 and repeat the process: 16 / 67

Advancing to step 2:
When dividing 16 by 67, we get 0 with a remainder of 16.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 16 leaves us with 16.
Bring next digit (3) of the dividend behind the 16 and repeat the process: 163 / 67

Step 3:
The number 67 fits into 163 2 times, leaving a remainder of 29.
Use 2 as the next digit of our solution. 
Result so far: 2.0
Subtracting 134 from 163 leaves us with 29.
Append the next digit (9) from the dividend to 29 and continue with: 299 / 67

Let's proceed to step 4:
67 goes into 299 4 times with a remainder of 31.
The next digit of our result is 4. 
Result so far: 24.0
Subtracting 268 from 299 leaves us with 31.
Grab the next digit (0) from the dividend, add it to 31, then carry on: 310 / 67

Let's proceed to step 5:
The number 67 fits into 310 4 times, leaving a remainder of 42.
The number 4 becomes the next digit in our result. 
Result so far: 244.0
Subtracting 268 from 310 leaves us with 42.
Bring next digit (8) of the dividend behind the 42 and repeat the process: 428 / 67

Moving on to step 6:
The number 67 fits into 428 6 times, leaving a remainder of 26.
Put 6 as the next digit of the answer. 
Result so far: 2446.0
The remainder is 26 after subtracting 402 from 428.
Include the next digit (7) from the dividend after 26, then repeat: 267 / 67

Advancing to step 7:
67 goes into 267 3 times with a remainder of 66.
The next digit of our result is 3. 
Result so far: 24463.0
The remainder is 66 after subtracting 201 from 267.
Append the next digit (1) from the dividend to 66 and continue with: 661 / 67

Advancing to step 8:
67 can be fit into 661 9 times, resulting in a remainder of 58.
Use 9 as the next digit of our solution. 
Result so far: 244639.0
The remainder is 58 after subtracting 603 from 661.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

Moving on to step 9:
67 can be fit into 580 8 times, resulting in a remainder of 44.
Record the quotient 8 as the next digit in the result. 
Result so far: 244639.8
Subtracting 536 from 580 leaves us with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Let's proceed to step 10:
If we divide 440 by 67, we get 6 and a remainder of 38.
Use 6 as the next digit of our solution. 
Result so far: 244639.86
If we take 402 away from 440, we end up with 38.
Since there are no more digits in the dividend, we add a zero to the remainder making it 380, and continue the process.

Going ahead to step 11:
If we divide 380 by 67, we get 5 and a remainder of 45.
Use 5 as the next digit of our solution. 
Result so far: 244639.865
Subtract 335 from 380 to get 45.
Since there are no more digits in the dividend, we add a zero to the remainder making it 450, and continue the process.

Advancing to step 12:
67 goes into 450 6 times with a remainder of 48.
Record the quotient 6 as the next digit in the result. 
Result so far: 244639.8656
Deduct 402 from 450 and we're left with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

Let's proceed to step 13:
480 divided by 67 is 7 with a remainder of 11.
Write down 7 as next digit of the result. 
Result so far: 244639.86567
If we subtract 469 from 480, we get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 14:
110 divided by 67 is 1 with a remainder of 43.
The next digit of our result is 1. 
Result so far: 244639.865671
Subtract 67 from 110 to get 43.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

Let's proceed to step 15:
430 divided by 67 is 6 with a remainder of 28.
Use 6 as the next digit of our solution. 
Result so far: 244639.8656716
The remainder is 28 after subtracting 402 from 430.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Moving on to step 16:
If we divide 280 by 67, we get 4 and a remainder of 12.
Put 4 as the next digit of the answer. 
Result so far: 244639.86567164
If we subtract 268 from 280, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

After the division, we end up with 244639.86567164 and a remainder of 1.2e-08.