Yes you can search for any articles at copyscape for free and have no limit! I use copyscape frequently earlier coz we have a lot of projects regarding to rewriting articles from one particular site (dont want to mention it). We make sure that our writers will rewrite the articles sentence by sentence to pass copyscape coz if they (the owner of the site) found out that we are just rewriting the articles in their site then we are doomed!:D
For those who dont know. Copyscape has a limit of 9 search per day for each site and after that 9 search you need to change the url of where the articles are located. Or you have another option which is paying them for .05$ per search for duplicate contents. The price is not bad at all but i have a problem paying them since i dont have a verified credit card right now. So decided to find another way to bypass the limit.
Ok here’s the step you should do.
1. Create an Blogger account https://www.blogger.com/start
2. Click “Create your blog now” button and fill up the form. I suggest you use gmail account.
3. You need to check your email and click on the confirmation link to verify your account.
4. Then you create a blog. You can post random title and domain name if your purpose is just for checking articles on copyscape.
5. Post the article that you wanted to check on copyscape on your blog. You can name the title as “1″ “2″ “3″ and so on until you reach 9 post so it will not be hard for you to organize it.
6. Check them one by one on copyscape until you reach the limit of 9 search for one url.
7. After the limit is reached. Go to settings of your blogger dashboard and scroll down and click Delete Blog so all the content that you posted will not able to crawl by Search engines coz you just post it for checking duplicate words only.
8. After that create another blog with different random name. its up to you how you will name it and it doesnt matter at all.
9. Just complete these process and youre done. Its very easy..
If you have any questions about this post please feel free to comment. 
