Modifiers matching interval:

• convenient,
• respiratory,
• statistical,
• discrete,
• hourly,
• equidistant,
• small,
• repetitive,
• temporal,
• melodic,
• fixed,
• tonal,
• descending,
• regular,
• common,
• basic,
• larger,
• vertical,
• irregular,
• long,
• smaller,
• short,
• longer,
• specified,
• real,
• monthly,

Simple categories matching longer:

• interval,
• period,
• time,
• instrument,
• line,
• duration,
• unit,
• term,
• season,