obstructive vs pester

obstructive

noun

  • One who obstructs something. 

adj

  • Causing obstructions. 

pester

noun

  • A bother or nuisance. 

verb

  • To bother, harass, or annoy persistently. 

How often have the words obstructive and pester occurred in a corpus of books? (source: Google Ngram Viewer )