CREATE TABLE exhibition (Exhibition_ID INT, Year INT, Theme TEXT, Artist_ID INT, Ticket_Price FLOAT)
CREATE TABLE exhibition_record (Exhibition_ID INT, Date TEXT, Attendance INT)
CREATE TABLE artist (Artist_ID INT, Name TEXT, Country TEXT, Year_Join INT, Age INT)

Bin the Year into weekday interval, then group and count by Year.
SELECT Year, COUNT(Year) FROM exhibition GROUP BY Year
SELECT "Year", COUNT("Year") FROM "exhibition" GROUP BY "Year"