Costochondritis: This condition is characterized by sharp, stabbing chest pain that can be fleeting and recurrent, often resolving on its own. The pain can be severe and may be described as electric in nature. The intermittent pattern and resolution within a few days align with the presentation of costochondritis.

Musculoskeletal strain: Strain or injury to the muscles or ligaments in the chest wall can cause sharp, intermittent pain that may be described as electric. The pattern of pain occurring every 5-10 minutes for a few days could be consistent with musculoskeletal issues, especially if there was a recent increase in physical activity.
Gastroesophageal reflux disease (GERD): GERD can cause chest pain that is sharp and intermittent, sometimes described as electric. Although GERD pain is more commonly associated with eating or lying down, it could potentially present in this manner, especially if the patient has a unique trigger or presentation.
Precordial catch syndrome: This condition involves sudden, sharp chest pain that can be severe and is often described as a "catch" or stabbing sensation. It can occur at any time and may resolve spontaneously, fitting the pattern described.

Acute coronary syndrome (ACS): Although less likely given the fleeting and recurrent nature of the pain, ACS (including myocardial infarction) must be considered, especially in patients with risk factors. The description of "electric" pain is not typical for ACS, but the potential consequences of missing this diagnosis are severe.
Pulmonary embolism (PE): PE can cause sudden, sharp chest pain that may be intermittent. Given the potential for severe outcomes if missed, PE should be considered, even though the pattern described is not the most common presentation.
Aortic dissection: This is a life-threatening condition that can cause severe, tearing chest pain. Although the pain is typically constant and not intermittent, any chest pain described as severe or unusual warrants consideration of aortic dissection.

Esophageal spasm: This condition involves abnormal muscle contractions of the esophagus, which can cause sharp, intermittent chest pain. While it's a less common cause of chest pain, it could potentially fit the described pattern.
Pericarditis: Inflammation of the pericardium can cause sharp, stabbing chest pain that may improve with sitting up and leaning forward. The pain can be intermittent, but it's usually more constant and accompanied by other symptoms like fever.
Neuropathic pain: Certain neuropathic conditions, such as thoracic outlet syndrome or intercostal neuralgia, can cause sharp, electric-like pain in the chest. These conditions are less common and would typically have other associated symptoms or findings.