Also interesting to see the weekend dips in google trends, e.g. Java: https://www.google.com/trends/explore?date=today%201-m&q=jav...
Same dips can be seen for JS:
https://www.google.com/trends/explore?date=today%201-m&q=%2F...
And on the Stack Overflow it seems that JS has perfect balance of workdays vs weekends.