Pettiness is often used informally to indicate someone's minor concerns or behaviors. She got caught up in the pettiness of office gossip.
Pro Tip 2/3
Negative Implication
Using 'pettiness' usually implies a negative judgment of someone's actions or attitudes. I can't believe his pettiness; he's upset over one unreturned pencil.
Pro Tip 3/3
Unnecessary Conflict
'Pettiness' implies disputes or disagreements that could be seen as insignificant or avoidable. Their constant bickering over who arrived first is just pettiness.