"each two days" is grammatically correct and can be used in written English.
It means that something occurs or is done every two days. Example: I water my plants each two days to keep them healthy.
Finally, we sacrificed 3 mice from different litters, from neonate stage (day +1) to adult stage (day +50) each two days, to perform the quantification of antithrombin mRNA levels and miRNAs miR-18a and miR-19b levels, during post-natal development.
Silver sulfadiazine (SSD), Flammazine® (1% SSD) or Flammacerium® (1% SSD + 2.2% cerium nitrate), is generally applied each two days.
The service is free for up to twenty questions each thirty days, and they get half a million of them per day.
He runs 100 miles a week instead of the typical 120, taking one day off each seven days.
This injection scheme was repeated three times, each three days, and the entire experiment covered a 9 day period.
Media of the culture environment was changed frequently each three days.
All arms served as start and goal arms roughly equally across each twenty-four days of testing.
"Tickets were fifty dollars for each of two days—should have been fifty-five.
The Land Rovers cost only $50 each for two days, and that included the driver.
For both groups the N-Back Task (of working memory) was administered in two test blocks on each of two days.
The rules for participation, sent to each candidate two days in advance, were standard.
