Skell is a fantastic resource if you want to learn how to use a new word. It gives examples sentences revealing how words are used in authentic situations so will help you to develop your language skills.
My students often ask me whether a word is frequent or not, which helps them to decide if it is a good word for them to learn. The advice I give them is based only on my intuition. To give them more reliable advice and to help them become independent learners I show them how they can find this information for themselves.
Corpora can be used to find out about word frequency but it takes a bit of time to learn how to use them. For quick solutions, Google Ngrams can be a useful starting point followed by some research using Skell. The beauty of Skell is that it is so simple to use and importantly, it provides good quality information about how words are really used.
It is a great resource for all language students and particularly good for students practicing Part 1 of the Reading and Use of English paper in the Cambridge exams such as First, CAE or Proficiency.
Click on the Skell website to find out more.