Two months and at least two months are totally different things.
1	Two	two	NUM	CD	NumForm=Word|NumType=Card	2	nummod	2:nummod	_
2	months	month	NOUN	NNS	Number=Plur	11	nsubj	11:nsubj	_
3	and	and	CCONJ	CC	_	7	cc	7:cc	_
4	at	at	ADP	IN	_	5	case	5:case	_
5	least	least	ADJ	JJS	Degree=Sup	7	nmod	7:nmod:at	_
6	two	two	NUM	CD	NumForm=Word|NumType=Card	7	nummod	7:nummod	_
7	months	month	NOUN	NNS	Number=Plur	2	conj	2:conj:and|11:nsubj	_
8	are	be	AUX	VBP	Mood=Ind|Number=Plur|Person=3|Tense=Pres|VerbForm=Fin	11	cop	11:cop	_
9	totally	totally	ADV	RB	_	10	advmod	10:advmod	_
10	different	different	ADJ	JJ	Degree=Pos	11	amod	11:amod	_
11	things	thing	NOUN	NNS	Number=Plur	0	root	0:root	SpaceAfter=No
12	.	.	PUNCT	.	_	11	punct	11:punct	_
