Database: language_corpus
Question: How many times did the word "grec" occur on the page titled "Àbac"?
SQL: SELECT T2.occurrences FROM words AS T1 INNER JOIN pages_words AS T2 ON T1.wid = T2.wid INNER JOIN pages AS T3 ON T2.pid = T3.pid WHERE T3.title = 'Àbac' AND T1.word = 'grec'