The word 'costs' is spelt wrongly. The word 'to' is misused. Correct sentence is It costs too much to mail a letter these days.
The term you're looking for is "malapropism," which is the incorrect use of a word in place of a similar-sounding word resulting in a nonsensical or humorous statement.
The doctor said I have a vitamin "C" deficiency because I eat too many cookies, but I think he meant 'cookie' deficiency!
their
It is one word: "Misused".
Incorrect:What's is that time clock say?Correct: What time does the clock say?
One that is used at the end of a sentence.Ex. Who are you going with? . Should be , With whom are you going ?. This is gaining wider acceptance daily . Most people are lazy in their speech habits .
malapropism
Misspelled or misused word, favorable.
Yes. All knowledge can be misused.
A SENTENCE WITH THE WORD OUNCE A SENTENCE WITH THE WORD OUNCE A SENTENCE WITH THE WORD OUNCE A SENTENCE WITH THE WORD OUNCE
The word "Wieners" is being misused in this context. It is derived from the German "Wiener Wurstchen" (Hot dog sausage).