The key word in the puzzle was 'racecar', which is a palindrome.
phrase
Frequency:
60
%
The phrase 'A Santa at NASA' is a palindrome when read in the mirror.
number
Frequency:
45
%
The magic number 121 is a palindrome.
Idiomatic Expressions for palindrome
Phrase: Madam, in Eden I'm Adam
Meaning: Another example of a palindrome phrase that reads the same forwards and backwards.
Usage: It is often used to illustrate the concept of palindromes or as a fun example of wordplay.