This is the 3817th most frequent German word.
schwerin
"Schwerin" is a proper noun referring to a city in northern Germany.
In this sentence, 'Schwerin' is used as a proper noun referring to the città.
Schwerin ist die Landeshauptstadt von Mecklenburg-Vorpommern.
Schwerin is the state capital of Mecklenburg-Western Pomerania.
Here, 'schwerin' is used in this specific context as a typo or miswritten form meant to represent 'schwer'.
Es ist schwerin, jeden Tag früh aufzustehen.
It is difficult to get up early every day.
In this instance, 'schwerin' appears to be a misused or erroneous form in place of a different word meant to describe heavily or thoroughly.