'infrequently-sought' originates from the combination of 'infrequent' and 'sought', where 'infrequent' means 'not occurring often' and 'sought' is the past participle of 'seek', meaning 'to look for'.

'infrequent' comes from the Latin word 'infrequens', and 'sought' is derived from the Old English 'sōhte', the past tense of 'sēcan'.

Initially, 'infrequent' meant 'not crowded', but over time it evolved to mean 'not occurring often'. 'Sought' has maintained its meaning related to searching or desiring.