We're dividing 777288 by 17 
The aim is to understand the frequency of 17 in 777288.

Going ahead to step 1:
If we divide 7 by 17, we get 0 and a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Grab the next digit (7) from the dividend, add it to 7, then carry on: 77 / 17

Going ahead to step 2:
If we divide 77 by 17, we get 4 and a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
Deduct 68 from 77 and we're left with 9.
Take the next digit (7) from the dividend and append it to 9, then repeat: 97 / 17

Step 3:
When dividing 97 by 17, we get 5 with a remainder of 12.
The number 5 becomes the next digit in our result. 
Result so far: 45.0
The remainder is 12 after subtracting 85 from 97.
Grab the next digit (2) from the dividend, add it to 12, then carry on: 122 / 17

Advancing to step 4:
The number 17 fits into 122 7 times, leaving a remainder of 3.
The number 7 becomes the next digit in our result. 
Result so far: 457.0
The remainder is 3 after subtracting 119 from 122.
Append the next digit (8) from the dividend to 3 and continue with: 38 / 17

Going ahead to step 5:
17 goes into 38 2 times with a remainder of 4.
The next digit of our result is 2. 
Result so far: 4572.0
Deduct 34 from 38 and we're left with 4.
Append the next digit (8) from the dividend to 4 and continue with: 48 / 17

Moving on to step 6:
The number 17 fits into 48 2 times, leaving a remainder of 14.
Record the quotient 2 as the next digit in the result. 
Result so far: 45722.0
If we subtract 34 from 48, we get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 7:
17 can be fit into 140 8 times, resulting in a remainder of 4.
Put 8 as the next digit of the answer. 
Result so far: 45722.8
If we take 136 away from 140, 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.

Let's proceed to step 8:
When dividing 40 by 17, we get 2 with a remainder of 6.
Record the quotient 2 as the next digit in the result. 
Result so far: 45722.82
If we take 34 away from 40, we end up 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.

Step 9:
60 divided by 17 is 3 with a remainder of 9.
The number 3 becomes the next digit in our result. 
Result so far: 45722.823
Subtract 51 from 60 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 10:
17 goes into 90 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 45722.8235
If we take 85 away from 90, we end up 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.

Going ahead to step 11:
50 divided by 17 is 2 with a remainder of 16.
The next digit of our result is 2. 
Result so far: 45722.82352
Subtracting 34 from 50 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 12:
The number 17 fits into 160 9 times, leaving a remainder of 7.
Write down 9 as next digit of the result. 
Result so far: 45722.823529
Subtracting 153 from 160 leaves us with 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:
The number 17 fits into 70 4 times, leaving a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 45722.8235294
If we take 68 away from 70, we end up 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.

Moving on to step 14:
If we divide 20 by 17, we get 1 and a remainder of 3.
The number 1 becomes the next digit in our result. 
Result so far: 45722.82352941
Subtract 17 from 20 to get 3.
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 outcome is 45722.82352941, with a leftover of 3e-09.