We look at the division of 8573709 by 14 
The aim is to understand the frequency of 14 in 8573709.

Let's proceed to step 1:
When dividing 8 by 14, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (5) from the dividend to 8 and continue with: 85 / 14

Step 2:
14 goes into 85 6 times with a remainder of 1.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
The remainder is 1 after subtracting 84 from 85.
Append the next digit (7) from the dividend to 1 and continue with: 17 / 14

On to step 3:
If we divide 17 by 14, we get 1 and a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 61.0
Subtracting 14 from 17 leaves us with 3.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 14

Advancing to step 4:
When dividing 33 by 14, we get 2 with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 612.0
If we subtract 28 from 33, we get 5.
Fetch the next digit (7) from the dividend, attach it to 5 and continue: 57 / 14

Moving on to step 5:
14 can be fit into 57 4 times, resulting in a remainder of 1.
Record the quotient 4 as the next digit in the result. 
Result so far: 6124.0
Subtract 56 from 57 to get 1.
Take the next digit (0) from the dividend and append it to 1, then repeat: 10 / 14

Moving on to step 6:
10 divided by 14 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 61240.0
If we subtract 0 from 10, we get 10.
Bring next digit (9) of the dividend behind the 10 and repeat the process: 109 / 14

Advancing to step 7:
14 goes into 109 7 times with a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 612407.0
If we subtract 98 from 109, 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.

Moving on to step 8:
The number 14 fits into 110 7 times, leaving a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 612407.7
Deduct 98 from 110 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

On to step 9:
If we divide 120 by 14, we get 8 and a remainder of 8.
The number 8 becomes the next digit in our result. 
Result so far: 612407.78
Subtract 112 from 120 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 10:
The number 14 fits into 80 5 times, leaving a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 612407.785
The remainder is 10 after subtracting 70 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 11:
100 divided by 14 is 7 with a remainder of 2.
The next digit of our result is 7. 
Result so far: 612407.7857
Subtracting 98 from 100 leaves us with 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 12:
If we divide 20 by 14, we get 1 and a remainder of 6.
The next digit of our result is 1. 
Result so far: 612407.78571
Subtracting 14 from 20 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Let's proceed to step 13:
14 can be fit into 60 4 times, resulting in a remainder of 4.
Put 4 as the next digit of the answer. 
Result so far: 612407.785714
Deduct 56 from 60 and we're left 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.

On to step 14:
If we divide 40 by 14, we get 2 and a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 612407.7857142
The remainder is 12 after subtracting 28 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 15:
14 can be fit into 120 8 times, resulting in a remainder of 8.
Put 8 as the next digit of the answer. 
Result so far: 612407.78571428
If we take 112 away from 120, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The quotient of the division is 612407.78571428, and the remainder is 8e-09.