This word belongs in Frequency Band 3. Band 3 contains words which occur between 0.01 and 0.1 times per million words in typical modern English usage. These words are not commonly found in general text types like novels and newspapers, but at the same they are not overly opaque or obscure. Nouns include ebullition and merengue, and examples of adjectives are amortizable, prelapsarian, contumacious, agglutinative, quantized, argentiferous...