'occasionally-linked' originates from the combination of 'occasionally,' derived from Latin 'occasio,' meaning 'a happening or occurrence,' and 'linked,' from Old English 'hlinc,' meaning 'a ridge or bank.'

'occasionally' evolved from the Latin 'occasio' through Old French 'occasion,' while 'linked' transformed from Old English 'hlinc' to the modern English 'link.'

Initially, 'occasionally' meant 'a happening,' and 'linked' meant 'a ridge or bank.' Over time, 'occasionally-linked' evolved to mean 'connected at irregular intervals.'