From Longman Dictionary of Contemporary Englishproficiencypro‧fi‧cien‧cy /prəˈfɪʃənsi/ noun [uncountable] GOOD ATa good standard of ability and skillproficiency in/with/at a high level of proficiency in English Nick’s proficiency with computers is well known.
Examples from the Corpus
proficiency• He spent days just gaining a proficiency with the typewriter.• Second, his indifference to business proficiency as a qualification for his closest companions.• Once children have achieved a certain proficiency as a reader, they prefer to read silently.• After two years he received the certificate of the college for proficiency in chemistry.• The principal component, as always, is lack of language proficiency.• Breadth of knowledge will be more important than technical proficiency.proficiency in/with/at• He spent days just gaining a proficiency with the typewriter.• Time spent in acquiring the preliminary concepts will amply repay itself later in terms of understanding, enjoyment and proficiency in mathematics.• After two years he received the certificate of the college for proficiency in chemistry.• Unless she's turned on by her proficiency with the spittoon.• However, the growing number of students with instrumental proficiency in recent years has meant an increasing concentration on orchestral work.• I haven't attempted to master its intricacies yet, but no doubt we shall both acquire some sort of proficiency in time.• Nick's proficiency with computers is well known.• The students' proficiency in speaking English is also tested.• S schools to raise their proficiency in science and math to the highest levels in the world.From Longman Business Dictionaryproficiencypro‧fi‧cien‧cy /prəˈfɪʃənsi/ noun [uncountable] a high standard of skill in a particular job or knowledge of a particular subjectOne corporation spends $2,000 a quarter bringing its employees up totechnical proficiency.proficiency inForeign medical graduates must pass a rigorous series of tests, showing proficiency in English. 