Question: which unit of time has the highest wikidata time precision?
Paraphrase: which unit of time has the most elevated wikidata time accuracy?
SPARQL (Wikidata): select ?ent where { ?ent wdt:P31 wd:Q1790144 . ?ent wdt:P2803 ?obj } ORDER BY DESC(?obj)LIMIT 5 
Answer: second, minute, hour, day, month