I'm designing a web-based charting application.
Charts can be viewed for different periods - i.e. Daily, Weekly, Monthly, Quarterly & Yearly
Instead of a drop down list to select the periodicity, I want to have a row of buttons by each chart to select the periodicity. The simplest option is to use the words initials - i.e. in English, D, W, M, Q & Y - there isn't space to spell the words out in full.
Also, the site will be localised, and will support non-latin scripts such as Chinese and Arabic (Arabic is also a language that doesn't really do abbreviations like we have in English).
So that the buttons don't have to be recreated for each supported language, can anyone think of icons that would represent Daily, Weekly, Monthly, Quarterly, Yearly and work across different cultures/languages?
Thanks for any ideas!