Let's divide 636987 by 17
The aim is to understand the frequency of 17 in 636987.

Going ahead to step 1:
If we divide 6 by 17, we get 0 and a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Bring next digit (3) of the dividend behind the 6 and repeat the process: 63 / 17

On to step 2:
17 can be fit into 63 3 times, resulting in a remainder of 12.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
Subtract 51 from 63 to get 12.
Include the next digit (6) from the dividend after 12, then repeat: 126 / 17

On to step 3:
The number 17 fits into 126 7 times, leaving a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 37.0
Subtract 119 from 126 to get 7.
Bring next digit (9) of the dividend behind the 7 and repeat the process: 79 / 17

Let's proceed to step 4:
17 goes into 79 4 times with a remainder of 11.
The number 4 becomes the next digit in our result. 
Result so far: 374.0
Subtract 68 from 79 to get 11.
Append the next digit (8) from the dividend to 11 and continue with: 118 / 17

Moving on to step 5:
17 can be fit into 118 6 times, resulting in a remainder of 16.
Record the quotient 6 as the next digit in the result. 
Result so far: 3746.0
Deduct 102 from 118 and we're left with 16.
Include the next digit (7) from the dividend after 16, then repeat: 167 / 17

Going ahead to step 6:
17 can be fit into 167 9 times, resulting in a remainder of 14.
Use 9 as the next digit of our solution. 
Result so far: 37469.0
Deduct 153 from 167 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.

Moving on to step 7:
When dividing 140 by 17, we get 8 with a remainder of 4.
The next digit of our result is 8. 
Result so far: 37469.8
Subtract 136 from 140 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Step 8:
When dividing 40 by 17, we get 2 with a remainder of 6.
Write down 2 as next digit of the result. 
Result so far: 37469.82
Deduct 34 from 40 and we're left 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.

On to step 9:
17 goes into 60 3 times with a remainder of 9.
Write down 3 as next digit of the result. 
Result so far: 37469.823
If we take 51 away from 60, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Going ahead to step 10:
When dividing 90 by 17, we get 5 with a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 37469.8235
Deduct 85 from 90 and we're left 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.

On to step 11:
When dividing 50 by 17, we get 2 with a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 37469.82352
The remainder is 16 after subtracting 34 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Moving on to step 12:
160 divided by 17 is 9 with a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 37469.823529
Subtract 153 from 160 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Step 13:
17 goes into 70 4 times with a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 37469.8235294
The remainder is 2 after subtracting 68 from 70.
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 14:
17 can be fit into 20 1 times, resulting in a remainder of 3.
Record the quotient 1 as the next digit in the result. 
Result so far: 37469.82352941
The remainder is 3 after subtracting 17 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final result is 37469.82352941 with a remainder of 3e-09.