1. In a sporadic manner
   - sporadically 
2. At regular time intervals

See also: periodical

• brachiopodous
• brachiosaurus
• brachium
• brachycephalic
• brachycephalism
• brachycephaly
• Brachychiton
• Brachychiton acerifolius
• Brachychiton australis
• Brachychiton populneus
• Brachychiton rupestris
• Brachycome
• Brachycome Iberidifolia
• brachycranial
• brachycranic
• brachydactylia
• brachydactylic
• brachydactylous
• brachydactyly
• brachypterous
• Brachystegia
• Brachystegia speciformis
• brachytherapy
• Brachyura
• brachyuran