Couldn't "ni" particle be used in this example?

Question

I'm a total newbie learning japanese as you will see, so please be patient with me. I have this sentence from my textbook:

Shiken no toki jisho o minai de kudasai!

Because it was a new lesson, I didn't know what were the meanings for shiken or toki, so I've just assumed that toki is an adjective for jisho and after I've looked up the words in the vocabulary section, it suddenly became really strange for me to think about how am I going to translate it.

So, my question is: Couldn't ni particle be used there between toki and jisho:

Shiken no toki ni jisho o minai de kudasai!

to mark the time in which the action takes place? I know the sentence is obvious for someone who does know japanese, but I'm only asking this for grammar purposes.

Thank you for your patience!

Answer 1

Yes, you can use ni there.

Shiken no toki ni jisho o minai de kudasai!

This sentence is grammatically correct and actually used. A web site https://oshiete.goo.ne.jp/qa/98363.html explains the reason:

　2)「時間の名詞」が複合の形をとる場合、例えば、「おととい」という時間を表わす名詞にさらに「朝」という時間を表わす名詞がついて「おとといの朝」などという形になる場合はやや複雑で、「あしたの昼、テニスをします」と助詞を伴わずにも使われますし，「あしたの昼に、テニスをします」と助詞を伴っても使われます。この二つの文の場合ですが，意味的には実は違いがありません。「に」を伴うことによって「強調」を表わしていると思われる傾向にあるようですが，この場合の「に」は「格助詞」として「より顕著な副詞表現に属することを表わしている」に過ぎません。

I understand the example

Shiken no toki ni

is

「時間の名詞」が複合の形をとる場合

.