'infrequently-requested' originates from the combination of 'infrequent' and 'request', where 'infrequent' meant 'not occurring often' and 'request' meant 'to ask for'.

'infrequent' changed from the Latin word 'infrequens' and 'request' from the Old French word 'requeste', eventually becoming the modern English word 'infrequently-requested'.

Initially, 'infrequent' meant 'not occurring often', and 'request' meant 'to ask for', and this meaning has largely remained the same in modern usage.