Noun
The state of rarely occuring; uncommonness; rareness; as, the infrquence of his visits.
The state of not being frequented; solitude; isolation; retirement; seclusion.
Source: Webster's dictionaryA continual feast of commendation is only to be obtained by merit or by wealth many are therefore obliged to content themselves with single morsels, and recompense the infrequency of their enjoyment by excess and riot, whenever fortune sets the banquet. Samuel Johnson
Also, the infrequency with which vaccines are administered among the general population since the eradication of the disease would leave most people unprotected in the event of an outbreak. Source: Internet
Growing fame; budding opera composer The infrequency of Tchaikovsky's musical successes, won with tremendous effort, exacerbated his lifelong sensitivity to criticism. Source: Internet
The physical cause which rendered this effort so painful probably accounts for the infrequency of his appearances in parliament, as well as for much that is otherwise inexplicable in his subsequent conduct. Source: Internet