We divide 666420 by 17
The aim is to understand the frequency of 17 in 666420.

Moving on to step 1:
17 goes into 6 0 times with a remainder of 6.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 17

Moving on to step 2:
17 goes into 66 3 times with a remainder of 15.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we subtract 51 from 66, we get 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 17

On to step 3:
17 can be fit into 156 9 times, resulting in a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 39.0
If we take 153 away from 156, we end up with 3.
Take the next digit (4) from the dividend and append it to 3, then repeat: 34 / 17

On to step 4:
If we divide 34 by 17, we get 2 and a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 392.0
If we take 34 away from 34, we end up with 0.
Bring next digit (2) of the dividend behind the 0 and repeat the process: 2 / 17

Step 5:
If we divide 2 by 17, we get 0 and a remainder of 2.
The next digit of our result is 0. 
Result so far: 3920.0
If we subtract 0 from 2, we get 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 17

On to step 6:
17 goes into 20 1 times with a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 39201.0
Subtracting 17 from 20 leaves us with 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Step 7:
30 divided by 17 is 1 with a remainder of 13.
Record the quotient 1 as the next digit in the result. 
Result so far: 39201.1
Subtract 17 from 30 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 8:
If we divide 130 by 17, we get 7 and a remainder of 11.
Write down 7 as next digit of the result. 
Result so far: 39201.17
Subtract 119 from 130 to 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.

Let's proceed to step 9:
110 divided by 17 is 6 with a remainder of 8.
Record the quotient 6 as the next digit in the result. 
Result so far: 39201.176
Deduct 102 from 110 and we're left 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.

Going ahead to step 10:
80 divided by 17 is 4 with a remainder of 12.
Write down 4 as next digit of the result. 
Result so far: 39201.1764
Subtract 68 from 80 to 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.

On to step 11:
The number 17 fits into 120 7 times, leaving a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 39201.17647
The remainder is 1 after subtracting 119 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 12:
When dividing 10 by 17, we get 0 with a remainder of 10.
Use 0 as the next digit of our solution. 
Result so far: 39201.17647
Subtract 0 from 10 to get 10.
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 13:
If we divide 100 by 17, we get 5 and a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 39201.1764705
Subtract 85 from 100 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Advancing to step 14:
When dividing 150 by 17, we get 8 with a remainder of 14.
The next digit of our result is 8. 
Result so far: 39201.17647058
Deduct 136 from 150 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Our division results in 39201.17647058 with a remaining 1.4e-08.