I like the FLAX too. It´s user friendly and crawls within BNC, comteporary English from Wikipedia or academical English, take your pick. Isn´t for a reason that FLAX stands for Flexible Language Acquisition, it´s not for nothing that it has the word "flexible" in it.http://flax.nzdl.org/greenstone3/flax
An example of search with the keywords thing and time (an almost rare combination), I choose BNC on that one:http://flax.nzdl.org/greenstone3/flax?a=g&rt=r&sa=CollocationQuery&s=CollocationQuery&s1.title=&c=collocations&s1.threshold=0.5&s1.startNum=0&s1.perPage=20&s1.sampleNum=10&s1.type=&s1.wordType=&s1.colloType=&s1.query=THING+TIME&s1.dbName=BNC
There are also COCA and other Corpora of English, but it would take a more upper intermediate or advanced level to deal with it.
I used the Prowritingaid to produce some collocations and then I found this "thing" that would go with "time", then I found it a bit of a challenge, then I got to the above one. It was then I found that that one was better to a beginning learner of English.https://prowritingaid.com/en/Collocation/Dictionary/thing
The sites Linguee and Wordreference are also great, one would need some more time to crawl inside the hits. But it can made easier with the use of CTRL + F.