What is the answer to this riddle "I am twice in a week and once in a year what am I"

By percy bysshe shelley hail to thee, blithe spirit! bird thou never wert, that from heaven, or near it, pourest thy full heart in profuse strains of unpremeditated art. higher still and higher from the earth thou springest like a cloud of fire; the blue deep thou wingest, and singing still dost soar, and soaring ever singest. in the golden lightning of the sunken sun, o'er which clouds are bright'ning, thou dost float and run; like an unbodied joy whose race is just begun. 1 select the correct answer. why is the poem "ode to a skylark" an example of a horatian ode? a. because its stanzas are of uniform length b. because it is filled with figurative language c. because it is filled with references to myths d. because it pays tribute to the figure of the skylark