'for safety sake' is a correct phrase that can be used in written English. It is usually used to express the idea of being cautious for the sake of safety. For example, "We should always wear a seatbelt when driving, for safety sake.".
We impressed upon her the importance of using the cane for safety sake, and she assured us that she'd keep it with her at all times at home.
Once you know what to expect, it's not that big a deal; but it would be nicer if the street name would be repeated, for safety sake.
I still do a lot of sitting in because I think that you have just got to do that for safety sake.
Sup 10 I still do a lot of sitting in because I think that you have just got to do that for safety sake.
For safety's sake, blitzing was prohibited.
"Never mind for safety's sake.
For safety's sake, the family should go immediately.
When I feel like I can't trust my brain 100%, Ludwig really comes in handy. It makes me translate and proofread faster and my output more reliable.
Claudia Letizia
Head Translator and Proofreader @ organictranslations.eu