Short answers, pulled from the story.
The Corps législatif was a legislative body established by the Constitution of the Year VIII in 1799. It replaced the Council of Five Hundred and functioned as a silent voting chamber without debate powers.
Napoleon Bonaparte stripped the Corps législatif of authority through the Constitution of the Year X in 1804. Louis XVIII officially abolished the body on the 4th of June 1814 after the fall of the First Empire.
The 1863 election resulted in 17251 seats filled within the Corps législatif. This figure reflects the massive expansion of the electorate under the Second Empire electoral cycle.
Napoleon III reconstituted the Corps législatif under the Constitution of 1852. Members were elected directly by universal suffrage for six-year terms starting with elections in February 1852.
The Chamber of Deputies replaced the Corps législatif following the final sitting in 1870. No further use of the name Corps législatif appeared in French law after that date and the institution ceased to exist as a functional legislative chamber.