おきに details
Examples
every other; at intervals of N — one unit is skipped between each occurrence
この薬は一日おきに飲んでください。
kono kusuri wa ichinichi oki ni nonde kudasai.
Please take this medicine every other day. neutral
このバスは一駅おきにしか停まらないから、案外早く着くよ。
kono basu wa hitoeki oki ni shika tomaranai kara, angai hayaku tsuku yo.
This bus only stops every other station, so it actually gets there fast. casual
会場の椅子は感染対策で一つおきに空けて並べられていた。
kaijou no isu wa kansen taisaku de hitotsu oki ni akete naraberarete ita.
The chairs in the venue were arranged with every other seat left empty as a precaution against infection. neutral
Formation
数[すう]＋助数詞[じょすうし]＋おきに（一日[いちにち]おきに・三[さん]駅[えき]おきに）attaches to noun phrase (schematic)
Notes
discrete units (一日おきに, 一つおきに); with time SPANS (5分おきに) usage
converges on ごとに, which is the more common choice there.
Related patterns
Similar
The classic 毎[まい]/おき interval trap — ごとに counts INCLUSIVELY, every Nth occurrence itself included (一日[いちにち]ごとに水[みず]をやる waters on day 1, 2, 3, every single day), while おきに names a GAP of N units skipped between occurrences (一日[いちにち]おきに水[みず]をやる waters day 1, skips day 2, waters day 3).