Kotoba no Hibiki

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What words to express ‘on a … basis’ in Japanese?

定期的ていきてきに、毎日まいにち・毎週まいしゅう・毎月まいつき

～で

We can distinguish two meanings of the word ‘on a … basis’ according to examples in the Oxford Learner’s Dictionaries.
Japanese uses different expressions for each meaning.

​1. [singular] on a … basis the way things are organized or arranged; how often something happens

the Oxford Learner’s Dictionaries

We are in contact on a regular basis.

Fatal accidents occur on our roads on a daily basis.

on a day-to-day/weekly/monthly basis

examples in the Oxford Learner’s Dictionaries

They can be translated as follows:
‘on a regular basis’ is for 定期的ていきてきに,
‘on a daily basis’ and ‘on a day-to-day basis’ are 毎日まいにち,
‘on weekly basis’ and ‘on monthly basis’ are 毎週まいしゅう・毎月まいつき.

to be employed on a permanent/temporary/part-time basis

All members of the committee work on a voluntary basis.

Applications will be considered on a case-by-case basis.

examples in the Oxford Learner’s Dictionaries

They can be translated as follows:
‘on a permanent/temporary/part-time basis’ is for 常勤じょうきんで／臨時りんじで／パートタイムで,
‘on a voluntary basis’ is for ボランティアで,
‘on a case by case basis’ is for ケースバイケースで.

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Advanced Tips

The words 毎まい・ごと・ごと mean ‘every’ or ‘each’.
See below for examples of ‘every’:

会あう人ひとごとに挨拶あいさつをする

I greet everyone I meet.

日毎ひごとに暖あたたかくなってきた

It’s getting warmer every day.

And examples of ‘each’ are below:

グループごとにリーダーを決きめてください

Please choose a leader for each group.

試合しあいごとにルールが違ちがう

Each game has different rules.