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Hi everyone,

I have a simple question if the post on site contain a list of idioms, these idioms are common we found them in different books, sites about foreign language ... are there considered plagiarism in SEO and AdSense?

Thank's for your help

researching idioms may be useful for:

Getting more keyword and content ideas;
Gaining a deeper understanding of the topical language;
Finding more catchy domain names ideas; etc

I would also like the answer to this as I am confused whether to use idioms while writing or not.