ちょっと一杯[chottoippai] let's have a quick drink
ばつ一[batsuichi] being once divorced
一向[hitaburu] nothing but
サラダ一皿[saradahitosara] plate of salad

安全第一[anzendaiichi] safety first
一か八か[ichikabachika] sink or swim
一っ走り[hitoppashiri] spin (as in 'take a car for a spin')
一つ一つ[hitotsuhitotsu] one-by-one

頻りに[shikirini] frequently
一頻り[hitoshikiri] for a while
高頻度[kouhindo] high frequency
吹き頻る[fukishikiru] to blow violently
低頻度[teihindo] low frequency

頻死[hinshi] dying
頻出[hinshutsu] common
頻度[hindo] frequency
頻発[hinpatsu] frequency
頻繁[hinpan] frequent